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*
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1971-06-01 |
1974-04-30 |
Texas Instruments Inc |
Pushbutton keyboard system
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US3839785A
(en)
*
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1971-06-01 |
1974-10-08 |
Texas Instruments Inc |
Pushbutton keyboard system
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(en)
*
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1971-06-01 |
1974-12-31 |
Texas Instruments Inc |
Pushbutton keyboard system
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*
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1971-08-23 |
1982-02-02 |
Hewlett-Packard Company |
Keyboard having switches with tactile feedback
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*
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1971-09-13 |
1973-07-03 |
North American Rockwell |
Elongated spring coil conductors applying tension force to pushbutton actuators in keyboard matrix switch assembly
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*
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1971-10-27 |
1974-01-01 |
Texas Instruments Inc |
Keyboard switch matrix assembly with improved guide means for reducing transfer of bounding motion to movable conductor
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*
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1972-04-19 |
1973-07-31 |
Colorado Instr Inc |
Keyboard switch assembly with improved hermetically sealed diaphragm contact structure
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*
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1972-06-19 |
1973-10-23 |
Texas Instruments Inc |
Diaphragm type pushbutton setting switch with fixed contact semiconductor substrate support
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FR2196515B1
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*
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1972-08-18 |
1977-09-16 |
Matsushita Electric Industrial Co Ltd |
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BE795425A
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1972-11-20 |
1973-05-29 |
Texas Instruments Inc |
Systeme perfectionne de clavier a boutons-poussoirs
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IT975915B
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*
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1972-12-01 |
1974-08-10 |
Olivetti & Co Spa |
Tastiera in materiale elastico per macchine per ufficio
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*
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1972-12-14 |
1977-08-02 |
Ing. C. Olivetti & C., S.P.A. |
Keyboard of elastic material for office machines
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USRE30923E
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*
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1973-01-02 |
1982-05-04 |
Bowmar Instrument Corporation |
Calculator keyboard switch with disc spring contact and printed circuit board
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*
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1973-01-02 |
1977-10-11 |
Bowmar Instrument Corporation |
Calculator keyboard switch with disc spring contact and printed circuit board
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JPS49109160U
(enrdf_load_stackoverflow)
*
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1973-01-11 |
1974-09-18 |
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1974-02-22 |
1981-09-17 |
Canon K.K., Tokyo |
Eingabevorrichtung für ein elektronisches Gerät
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1974-04-29 |
1977-01-25 |
Texas Instruments Incorporated |
Electrical contact member having low electrical resistance
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1974-05-21 |
1978-02-14 |
Texas Instruments Incorporated |
Keyboard apparatus and method of making
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1974-05-22 |
1976-02-12 |
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*
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1974-06-14 |
1975-09-23 |
Mohawk Data Sciences Corp |
Dome shaped switch member
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*
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1974-07-03 |
1975-10-28 |
Hewlett Packard Co |
Keyboard type switch with rocker type key actuator
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1974-09-23 |
1976-03-30 |
Xerox Corporation |
Arch shaped snap-type switch contact
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1974-11-29 |
1977-01-25 |
Texas Instruments Incorporated |
Pushbutton keyboard switch assembly having individual concave-convex contacts integrally attached to conductor strips
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1974-11-29 |
1976-04-20 |
Texas Instruments Incorporated |
Pushbutton keyboard system
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1975-01-10 |
1976-11-30 |
Texas Instruments Incorporated |
Pushbutton keyboard system having preformed recessed support with contacts mounted on face and in recesses
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1975-01-10 |
1976-12-07 |
Texas Instruments Incorporated |
Pushbutton keyboard system and method of making same
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1975-02-03 |
1976-08-03 |
Texas Instruments Incorporated |
Pushbutton keyboard assembly having pole and inner contacts simultaneously engaged by a bridging contact
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1975-03-17 |
1976-12-07 |
Litronix, Inc. |
Pushbutton keyboard assembly with over center diaphragm contact
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1975-03-21 |
1976-07-27 |
Amp Incorporated |
Keyboard switch assembly having one piece plural pushbutton actuator and resilient mounting structure for plural cantilever beam contacts
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1975-04-03 |
1976-11-30 |
Magic Dot, Inc. |
Membrane keyboard apparatus
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1975-04-25 |
1977-05-03 |
Neomed Incorporated |
Hermetically sealed resilient contact switch having surgical applications
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DE7520309U
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1975-06-26 |
1978-10-19 |
Braun Ag, 6000 Frankfurt |
Schalter mit zwei Schaltstellungen
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1975-12-24 |
1977-09-06 |
Texas Instruments Incorporated |
Keyboard switch with printed wiring board structure and its method of manufacture
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1976-02-20 |
1981-11-27 |
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1976-09-21 |
1977-12-27 |
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Electronic calculator with switches in solid V- and U-shaped groups
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1976-12-06 |
1978-04-25 |
Texas Instruments Incorporated |
Keyboard apparatus
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1977-09-27 |
1985-07-18 |
Robert Bosch Gmbh, 7000 Stuttgart |
Tastschalter zur Herstellung bzw. Unterbrechung einer elektrischen Verbindung
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1978-10-02 |
1980-12-02 |
Texas Instruments Incorporated |
Keyboard apparatus
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1980-03-26 |
1984-07-26 |
Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co, 8740 Bad Neustadt |
Tastatur
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1980-04-01 |
1981-10-08 |
Wilhelm Ruf KG, 8000 München |
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1983-01-11 |
1987-07-21 |
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Electronic equipment having a key input function
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1984-09-29 |
1988-12-27 |
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Push switch sealed against contaminants
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1986-12-19 |
1988-01-19 |
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1992-03-05 |
2001-04-24 |
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1995-08-01 |
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2014-03-18 |
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Protective cover for terminal keypad security switches
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2009-01-07 |
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