DE3170909D1 - Keyboards and methods of operating keyboards - Google Patents

Keyboards and methods of operating keyboards

Info

Publication number
DE3170909D1
DE3170909D1 DE8181900304T DE3170909T DE3170909D1 DE 3170909 D1 DE3170909 D1 DE 3170909D1 DE 8181900304 T DE8181900304 T DE 8181900304T DE 3170909 T DE3170909 T DE 3170909T DE 3170909 D1 DE3170909 D1 DE 3170909D1
Authority
DE
Germany
Prior art keywords
keyboards
methods
operating
operating keyboards
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
DE8181900304T
Other languages
German (de)
Inventor
Ian Andrew Noel Litterick
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority claimed from PCT/GB1981/000013 external-priority patent/WO1981002272A1/en
Application granted granted Critical
Publication of DE3170909D1 publication Critical patent/DE3170909D1/en
Expired legal-status Critical Current

Links

DE8181900304T 1980-02-05 1981-02-05 Keyboards and methods of operating keyboards Expired DE3170909D1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GB8003729 1980-02-05
GB8012944 1980-04-19
GB8016644 1980-05-20
GB8016645 1980-05-20
GB8035233 1980-11-03
GB8035232 1980-11-03
PCT/GB1981/000013 WO1981002272A1 (en) 1980-02-05 1981-02-05 Keyboards and methods of operating keyboards

Publications (1)

Publication Number Publication Date
DE3170909D1 true DE3170909D1 (en) 1985-07-18

Family

ID=27562666

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181900304T Expired DE3170909D1 (en) 1980-02-05 1981-02-05 Keyboards and methods of operating keyboards

Country Status (1)

Country Link
DE (1) DE3170909D1 (en)

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee