DE3277004D1 - Optical keyboard with common light transmission members - Google Patents

Optical keyboard with common light transmission members

Info

Publication number
DE3277004D1
DE3277004D1 DE8282901337T DE3277004T DE3277004D1 DE 3277004 D1 DE3277004 D1 DE 3277004D1 DE 8282901337 T DE8282901337 T DE 8282901337T DE 3277004 T DE3277004 T DE 3277004T DE 3277004 D1 DE3277004 D1 DE 3277004D1
Authority
DE
Germany
Prior art keywords
light transmission
transmission members
common light
optical keyboard
keyboard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8282901337T
Other languages
German (de)
Inventor
Robert Leroy Paterson
Jerry Mac Sublette
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lexmark International Inc
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE3277004D1 publication Critical patent/DE3277004D1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
DE8282901337T 1982-03-29 1982-03-29 Optical keyboard with common light transmission members Expired DE3277004D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1982/000379 WO1983003386A1 (en) 1982-03-29 1982-03-29 Optical keyboard with common light transmission members

Publications (1)

Publication Number Publication Date
DE3277004D1 true DE3277004D1 (en) 1987-09-24

Family

ID=22167892

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282901337T Expired DE3277004D1 (en) 1982-03-29 1982-03-29 Optical keyboard with common light transmission members

Country Status (4)

Country Link
EP (1) EP0104168B1 (en)
JP (1) JPS59500637A (en)
DE (1) DE3277004D1 (en)
WO (1) WO1983003386A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950001730B1 (en) * 1991-06-08 1995-02-28 주식회사 일진 Keyboard unit
GB2406944A (en) * 2003-10-09 2005-04-13 Motorola Inc Keyboard switching devices

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609759A (en) * 1969-12-31 1971-09-28 Emerson Electric Co Photoelectric keyboard encoder
US3611357A (en) * 1970-03-16 1971-10-05 Texas Instruments Inc Pushbutton keyboard assembly
US3648050A (en) * 1970-08-06 1972-03-07 Tuh Kai Koo Optoelectronic data entry means having plurality of control means to direct part of radiation in channel from radiation source to output channel
JPS5145456B2 (en) * 1971-08-07 1976-12-03
US3856127A (en) * 1972-11-24 1974-12-24 U Halfon Photo-optical keyboard
US4254407A (en) * 1979-07-18 1981-03-03 Ncr Corporation Data processing system having optically linked subsystems, including an optical keyboard

Also Published As

Publication number Publication date
JPH048888B2 (en) 1992-02-18
WO1983003386A1 (en) 1983-10-13
EP0104168A1 (en) 1984-04-04
EP0104168B1 (en) 1987-08-19
JPS59500637A (en) 1984-04-12
EP0104168A4 (en) 1985-10-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: LEXMARK INTERNATIONAL, INC. (N.D.GES.D.STAATES DEL

8328 Change in the person/name/address of the agent

Free format text: ABITZ, W., DIPL.-ING.DR.-ING. MORF, D., DR. GRITSCHNEDER, M., DIPL.-PHYS. FRHR. VON WITTGENSTEIN, A., DIPL.-CHEM. DR.PHIL.NAT., PAT.-ANWAELTE, 8000 MUENCHEN

8339 Ceased/non-payment of the annual fee