CA972411A - Pushbutton keyboard system - Google Patents

Pushbutton keyboard system

Info

Publication number
CA972411A
CA972411A CA133,153A CA133153A CA972411A CA 972411 A CA972411 A CA 972411A CA 133153 A CA133153 A CA 133153A CA 972411 A CA972411 A CA 972411A
Authority
CA
Canada
Prior art keywords
keyboard system
pushbutton keyboard
pushbutton
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
CA133,153A
Other versions
CA133153S (en
Inventor
Henry J. Boulanger
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
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 Texas Instruments Inc filed Critical Texas Instruments Inc
Priority to CA133,153A priority Critical patent/CA972411A/en
Application granted granted Critical
Publication of CA972411A publication Critical patent/CA972411A/en
Expired legal-status Critical Current

Links

CA133,153A 1972-01-25 1972-01-25 Pushbutton keyboard system Expired CA972411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA133,153A CA972411A (en) 1972-01-25 1972-01-25 Pushbutton keyboard system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA133,153A CA972411A (en) 1972-01-25 1972-01-25 Pushbutton keyboard system

Publications (1)

Publication Number Publication Date
CA972411A true CA972411A (en) 1975-08-05

Family

ID=4092141

Family Applications (1)

Application Number Title Priority Date Filing Date
CA133,153A Expired CA972411A (en) 1972-01-25 1972-01-25 Pushbutton keyboard system

Country Status (1)

Country Link
CA (1) CA972411A (en)

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