|
US2421998A
(en)
*
|
1941-05-16 |
1947-06-10 |
Signal Engincering & Mfg Compa |
Electrical circuit controlling device
|
|
US2452034A
(en)
*
|
1944-10-06 |
1948-10-26 |
Walter H Campbell |
Electrical drop signal device
|
|
US2505904A
(en)
*
|
1945-05-28 |
1950-05-02 |
Allen Bradley Co |
Holding relay with permanent magnet
|
|
US2504996A
(en)
*
|
1945-08-22 |
1950-04-25 |
Macdonald Waldron Shapleigh |
Electromotive device
|
|
US2541018A
(en)
*
|
1946-11-01 |
1951-02-13 |
Signal Tuned Radio Corp |
Stop-on-signal radio apparatus
|
|
US2565911A
(en)
*
|
1948-01-28 |
1951-08-28 |
Frank T Cooper |
Electronic device for sound reproduction of musical instruments
|
|
US2538819A
(en)
*
|
1948-09-07 |
1951-01-23 |
Kellogg Switchboard & Supply |
Plural armature electromagnetic counting device
|
|
US2552636A
(en)
*
|
1949-02-14 |
1951-05-15 |
Herbert Clemmens |
Time-delay relay arrangement
|
|
US2715719A
(en)
*
|
1951-06-14 |
1955-08-16 |
Itt |
Remote supervisory and control system
|
|
US2869050A
(en)
*
|
1952-01-04 |
1959-01-13 |
|
Magnetic circuits |
|
US2871676A
(en)
*
|
1954-07-06 |
1959-02-03 |
Gen Motors Corp |
Refrigerating apparatus with magnetic latch
|
|
US3022400A
(en)
*
|
1957-06-27 |
1962-02-20 |
Ahlefeldt Rolf S Von |
Two-way solenoid
|
|
US3142036A
(en)
*
|
1958-06-09 |
1964-07-21 |
Ibm |
Multi-aperture magnetic core storage device
|
|
US3239721A
(en)
*
|
1958-12-18 |
1966-03-08 |
Monroe Int |
Electromagnetically controlled readout device
|
|
US3109126A
(en)
*
|
1959-12-09 |
1963-10-29 |
Gen Signal Corp |
Magnetic stick type relay
|
|
US3153227A
(en)
*
|
1960-06-30 |
1964-10-13 |
Monroe Int |
Display device having magnetically controlled plural indicia plates
|
|
NL275584A
(US06521211-20030218-C00004.png)
*
|
1961-03-06 |
1900-01-01 |
|
|
|
US3217122A
(en)
*
|
1961-11-01 |
1965-11-09 |
Automatic Elect Lab |
Bi-stable reed relay
|
|
US3506883A
(en)
*
|
1965-12-22 |
1970-04-14 |
Heiwa Electric |
Electrical locking device
|
|
US4409552A
(en)
*
|
1981-04-16 |
1983-10-11 |
Honeywell Inc. |
Cyclic means with magnetic latch for checking switch integrity
|
