Patent Details
New patents added: 29 September 2000 more coming soon...
Last patent image update : 36 patent images added, 18 June 2001
Special Thanks to Karen Newton for typing these patents,
and to Hilary Tugwood for the typing that she did.
My thanks also to James Boyk, California Institute of Technology for suggesting this page.
Below
you will find a list of all of Alan Blumleins' 128 Patents listed by patent
number.
Next to each is a brief description of the patent.
Use the Patent Number
as a link to the detailed file for each of the patents.
Please note that a ' Y ' in the far
right column indicates that Patent Images have been uploaded.
| 1 | 291,511 | Improvements relating to loaded telephone circuits and particularly to the reduction of cross-tall therein |
Y
|
| 2 | 323,037 | Alternating current bridge circuits |
Y
|
| 3 | 334,652 | Improvements in telephone and like transmission systems |
Y
|
| 4 | 335,935 | Composite signaling system |
Y
|
| 5 | 337,134 | Improvements in submarine cable signaling systems |
Y
|
| 6 | 338,588 | Improvements in or relating to variable mutual inductances |
Y
|
| 7 | 350,954 | Improvements in electro-mechanical sound recording devices more especially of the moving coil type | |
| 8 | 350,998 | Improvements in apparatus for recording sounds upon wax or other like discs or blanks | |
| 9 | 357,229 | Terminal shield for submarine cable | |
| 10 | 361,468 | Improvements in sound reproducing and recording devices | |
| 11 | 362,472 | Improvements in electrical transmission devices | |
| 12 | 363,627 | Improvements in or relating to apparatus for the interconversion of electrical and mechanical energy such as used in sound recording or reproducing apparatus | |
| 13 | 368,336 | Improvements in and relating to the mounting of pivoted apparatus such as electrical sound recording devices | |
| 14 | 369,063 | Improvements in electro-acoustic devices | |
| 15 | 394,325 | Improvements in and relating to sound-transmission, sound-recording and sound-reproduction systems |
Y
|
| 16 | 400,976 | Improvements relating to oscillatory electric circuits such as may be used for example in connection with cathode ray devices | |
| 17 | 402,483 | Improvements in electric coils | |
| 18 | 417,718 | Improvements in or relating to vibratory devices such, for example, as are used in the electrical recording or reproduction of sound | |
| 19 | 419,284 | Improvements in and relating to inductance coils and the like for use in radio-frequency current circuits | |
| 20 | 421,546 | Improvements in or relating to the supply of electrical energy to varying loads for example to thermionic valve apparatus | |
| 21 | 422,914 | Improvements in or relating to television and the like apparatus | |
| 22 | 425,553 | Improvements in or relating to thermionic valve amplifiers | |
| 23 | 429,022 | Improvements in and relating to sound-transmission, sound-recording and sound-reproduction systems | |
| 24 | 429,054 | Improvements in and relating to sound-transmission, sound-recording and sound-reproduction systems | |
| 25 | 432,485 | Improvements in or relating to television and the like systems employing cathode ray tubes | |
| 26 | 432,978 | Improvements in or relating to directional wireless aerial systems | |
| 27 | 434,876 | Improvements in or relating to television and the like systems | |
| 28 | 436,734 | Improvements in or relating to electrical amplifiers such as may be used for example in television | |
| 29 | 445,968 | Improvements in or relating to aerial systems | |
| 30 | 446,661 | Improvements in or relating to television transmitting systems | |
| 31 | 446,663 | Improvements in or relating to television systems | |
| 32 | 447,754 | Improvements in or relating to insulated electrical conductors | |
| 33 | 447,824 | Improvements in or relating to the manufacture of insulated electrically conductive screens more particularly for use in cathode ray tubes | |
| 34 | 448,421 | Improvements in or relating to thermionic valve circuits | |
| 35 | 449,242 | Improvements in apparatus for amplifying electrical variations | |
| 36 | 449,533 | Improvements in or relating to coils for producing a magnetic field of approximately uniform flux density for use for example with cathode ray tubes | |
| 37 | 452,713 | Improvements in cable suitable or the transmission of high frequency electric currents | |
| 38 | 452,772 | Improvements in cable suitable or the transmission of high frequency electric currents | |
| 39 | 452,791 | Improvements in or relating to directional wireless aerial systems | |
| 40 | 455,492 | Improvements in or relating to electric signal transmission lines | |
| 41 | 455,858 | Improvements in or relating to the transmission of impulses of different kinds over a common channel for example in television and like systems | |
| 42 | 456,135 | Improvements in or relating to television and like transmitting systems | |
| 43 | 456,444 | Improvements in and relating to electrical sound transmission systems | |
| 44 | 458,585 | Improvements in and relating to the transmission of electrical signals having a direct current component | |
| 45 | 461,004 | Improvements in or relating to apparatus for the supply of electrical energy to varying loads | |
| 46 | 461,324 | Improvements in or relating to high frequency electric transmission lines | |
| 47 | 462,530 | Improvements in or relating to electric circuits for reducing the effective shunt capacity introduced by circuit elements such as for example electric batteries | |
| 48 | 462,583 | Improvements in or relating to the reduction of the effects of unwanted reactance introduced in electric circuit arrangements by certain circuit elements | |
| 49 | 462,584 | Improvements in or relating to electric circuits for reducing the effective shunt capacity introduced by circuit elements such as for example electric batteries | |
| 50 | 462,823 | Improvements in or relating to the supply of electrical energy to varying loads for example thermionic valve apparatus | |
| 51 | 463,111 | Improvements in or relating to frequency selective electric cables | |
| 52 | 464,443 | Improvements in or relating to aerial systems | |
| 53 | 466,418 | Improvements in or relating to electric signal transmission systems | |
| 54 | 470,408 | Improvements in or relating to electric signal transmission lines | |
| 55 | 470,495 | Improvements in or relating to multiplex signaling systems | |
| 56 | 473,276 | Improvements in or relating to rectifiers for alternating current | |
| 57 | 474,607 | Improvements in or relating to electric smoothing circuit arrangements | |
| 58 | 475,729 | Improvements in or relating to voltage regulating systems | |
| 59 | 476,935 | Improvements in or relating to television systems | |
| 60 | 477,392 | Improvements in or relating to alternating current measuring instruments | |
| 61 | 479,113 | Improvements in or relating to thermionic valve circuits particularly for use in television | |
| 62 | 479,599 | Improvements in or relating to modulated carrier wave receivers | |
| 63 | 480,355 | Improvements in or relating to high tension supply circuits for electron discharge devices | |
| 64 | 482,195 | Improvements in or relating to electromagnetic deflecting coils for cathode ray tubes | |
| 65 | 482,370 | Improvements in or relating to oscillatory electric circuits | |
| 66 | 482,740 | Improvements in or relating to thermionic valve amplifying circuit arrangements | |
| 67 | 483,650 | Improvements in or relating to electromagnetic deflecting coils for cathode ray tubes | |
| 68 | 489,950 | Improvements in or relating to thermionic valve and other electric circuits | |
| 69 | 490,150 | Improvements in or relating to television systems | |
| 70 | 490,205 | Improvements in or relating to television transmitting apparatus | |
| 71 | 491,490 | Improvements in or relating to impedance networks for coupling electric cable circuits | |
| 72 | 495,724 | Improvements in or relating to television receiving systems | |
| 73 | 496,139 | Improvements in or relating to alternating current machines | |
| 74 | 496,883 | Improvements in or relating to thermionic valve amplifying circuits | |
| 75 | 497,060 | Improvements in or relating to thermionic amplifiers | |
| 76 | 501,966 | Improvements in or relating to television systems | |
| 77 | 503,555 | Improvements in or relating to television transmitting and receiving systems | |
| 78 | 503,765 | Improvements in or relating to electric cables | |
| 79 | 505,079 | Improvements in or relating to wireless transmission or receiving apparatus | |
| 80 | 505,480 | Improvements in or relating to thermionic valve circuits | |
| 81 | 507,239 | Improvements in or relating to the transmission or reception of electrical signals | |
| 82 | 507,417 | Improvements in or relating to radio receivers | |
| 83 | 507,665 | Improvements in or relating to thermionic valve voltmeter and potentiometer circuits and the like | |
| 84 | 508,377 | Improvements in or relating to television or other signal transmission systems | |
| 85 | 512,109 | Improvements in or relating to television or other signal transmission systems | |
| 86 | 514,065 | Improvements in or relating to thermionic valve circuits | |
| 87 | 514,825 | Improvements in or relating to protective devices in connection with high voltage electrical discharge apparatus | |
| 88 | 515,044 | Improvements in or relating to circuit arrangements embodying cathode ray oscillographs | |
| 89 | 515,348 | Improvements in or relating to signal amplifying systems | |
| 90 | 515,360 | Improvements in or relating to television or other signal transmission systems | |
| 91 | 515,361 | Improvements in or relating to the transmission of electrical signals having a direct current component | |
| 92 | 515,362 | Improvements in or relating to the transmission of electrical signals having a direct current component | |
| 93 | 515,364 | Improvements in or relating to the transmission of electrical signals | |
| 94 | 515,684 | Improvements in or relating to high frequency electrical conductors or radiators | |
| 95 | 517,516 | Improvements in or relating to electric wave transmission networks | |
| 96 | 520,646 | Improvements in or relating to television transmitting tubes | |
| 97 | 528,310 | Improvements in or relating to thermionic valve circuits | |
| 98 | 529,590 | Improvements in or relating to thermionic valve amplifiers | |
| 99 | 534,465 | Improvements in or relating to magnetic focussing arrangements for cathode ray tubes | |
| 100 | 536,089 | Improvements in or relating to thermionic valve amplifiers | |
| 101 | 541,942 | Improvements in or relating to bridge arrangements for the comparison of electrical resistances | |
| 102 | 543,602 | Improvements in or relating to electrical phase or time delay indicating or controlling circuits | |
| 103 | 554,715 | Improvements in or relating to apparatus for modulating the frequency of electrical oscillations | |
| 104 | 563,464 | Improvements in or relating to thermionic valve oscillators | |
| 105 | 567,227 | Improvements in or relating to multiple contact electric switches | |
| 106 | 574,133 | Improvements in or relating to circuit arrangements for generating electrical waveforms | |
| 107 | 574,708 | Improvements in or relating to electron discharge devices | |
| 108 | 577,817 | Improvements in or relating to electrical supply apparatus | |
| 109 | 577,942 | Improvements in or relating to apparatus for generating electrical pulses | |
| 110 | 579,154 | Improvements in or relating to the detection and/or observation of reflecting objects by means of radiation | |
| 111 | 579,725 | Improvements in or relating to pulse generating thermionic valve apparatus | |
| 112 | 580,527 | Improvements in or relating to electrical circuit arrangements for effecting integration and applications thereof | |
| 113 | 581,161 | Improvements in methods and apparatus for the measurement of small capacities and applications thereof | |
| 114 | 581,164 | Improvements in or relating to electrical bridge arrangements | |
| 115 | 581,167 | Improvements in or relating to high frequency electric circuit arrangements | |
| 116 | 581,561 | Improvements in or relating to pulse generating thermionic valve apparatus | |
| 117 | 581,920 | Improvements in or relating to methods and apparatus for determining the direction or position of sources or reflectors of radiant energy | |
| 118 | 582,503 | Improvements in or relating to pulse signal selecting and indicating systems | |
| 119 | 585,789 | Improvements in or relating to self-balancing bridge arrangements | |
| 120 | 585,906 | Improvements in or relating to methods and apparatus for determining the direction or position of sources or reflectors of radiant energy | |
| 121 | 585,907 | Improvements in or relating to methods and apparatus for reducing the effect of interference in the observation of recurrent oscillatory signals | |
| 122 | 585,908 | Improvements in or relating to methods and apparatus for modifying recurrent signals and applications thereof | |
| 123 | 587,562 | Improvements in or relating to apparatus for the reception of modulated oscillations | |
| 124 | 587,878 | Improvements in or relating to electrical bridge arrangements | |
| 125 | 589,127 | Improvements in or relating to apparatus for generating electrical impulses | |
| 126 | 589,228 | Improvements in or relating to apparatus for the control of the timing of recurrent signals | |
| 127 | 589,229 | Improvements in or relating to radio receivers and application thereof | |
| 128 | 595,509 | Improvements in or relating to Electric Oscillation Generators |