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Browse by Category: Main > Communications
Class Information
Number: 178/17C
Name: Telegraphy > Systems > Automatic > Transmitters or recorders > Keyboard
Description:










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8629790 Letter input structure using morse code and input method of the same Jan. 14, 2014
8350730 Keyboard scan Jan. 8, 2013
8350733 Keyboard scan for human interface devices Jan. 8, 2013
7978181 Keystroke tactility arrangement on a smooth touch surface Jul. 12, 2011
7893922 Touch sensor with tactile feedback Feb. 22, 2011
6906695 Touch control apparatus and touch control method that can be applied to electronic instrument Jun. 14, 2005
6805506 Keyboard with multiple indicia sets Oct. 19, 2004
6748568 Apparatus and method for verifying proper data entry and detecting common typing errors Jun. 8, 2004
6288652 Digitally encoded keyless entry keypad switch Sep. 11, 2001
6236339 Key, input unit using such key, and control system comprising such input unit and electronic apparatus acoustically connected to such input unit May. 22, 2001
4616213 Capacitive multikey keyboard for inputting data into a computer Oct. 7, 1986
4599607 Acoustic keyboard Jul. 8, 1986
4555693 Multikey keyboard for inputting data into a computer Nov. 26, 1985
4529967 Non contacting inductive keyboard Jul. 16, 1985
4518951 Integrated circuit for a keyboard of an electronic apparatus May. 21, 1985
4502040 Keyboard having keys activated by electrical contacts and the capacity to read one state from among four possible states Feb. 26, 1985
4498073 Keyboard with simultaneous operations Feb. 5, 1985
4495485 Touch control arrangement for data entry Jan. 22, 1985
4442506 Portable word-processor Apr. 10, 1984
4430644 Encoding apparatus having an acoustic member with mirror-image tabs Feb. 7, 1984
4417824 Optical keyboard with common light transmission members Nov. 29, 1983
4415781 Membrane switch Nov. 15, 1983
4412209 RC Array Oct. 25, 1983
4395587 Method and apparatus for representing characters Jul. 26, 1983
4384633 Perforated acoustic transport member May. 24, 1983
4381500 Keyboard apparatus Apr. 26, 1983
4381501 Encoding apparatus utilizing acoustic waves of controlled initial polarity Apr. 26, 1983
4381502 Method and apparatus for character generation Apr. 26, 1983
4376469 Stepped acoustic transport member Mar. 15, 1983
4375060 Electronic apparatus having special key Feb. 22, 1983
4360892 Portable word-processor Nov. 23, 1982
4346369 Keyboard encoder-decoder Aug. 24, 1982
4344068 Coding schemes for acoustic delay line data collection system Aug. 10, 1982
4344069 Method and apparatus for character generation Aug. 10, 1982
4329541 Dialing system for teleprinter May. 11, 1982
4319077 Circuit for coded symbol conversion Mar. 9, 1982
4311991 Acoustic transmission member Jan. 19, 1982
4298861 Integrated ultrasonic magnetic encoder Nov. 3, 1981
4277778 Information transmitting system Jul. 7, 1981
4258356 Multi bar encoding apparatus utilizing acoustic energy Mar. 24, 1981
4241333 Key-operated arrangement for producing code characters Dec. 23, 1980
4231016 Input signal recognition circuit Oct. 28, 1980
4190826 Multidevice position digital encoder Feb. 26, 1980
4140872 Control system for functional sequences Feb. 20, 1979
4138197 Key actuator Feb. 6, 1979
4136336 Keyboard apparatus Jan. 23, 1979
4132487 Keyboard switch Jan. 2, 1979
4121048 Multiple shift electronic keyboard Oct. 17, 1978
4089401 Segmented printout device May. 16, 1978
4074262 Key input circuit Feb. 14, 1978

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