CA211987A - Practice keyboard - Google Patents

Practice keyboard

Info

Publication number
CA211987A
CA211987A CA211987A CA211987DA CA211987A CA 211987 A CA211987 A CA 211987A CA 211987 A CA211987 A CA 211987A CA 211987D A CA211987D A CA 211987DA CA 211987 A CA211987 A CA 211987A
Authority
CA
Canada
Prior art keywords
practice keyboard
keyboard
practice
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
CA211987A
Other languages
French (fr)
Inventor
A. Butler Walter
V. Cooper Arthur
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA211987A publication Critical patent/CA211987A/en
Expired legal-status Critical Current

Links

CA211987A Practice keyboard Expired CA211987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA211987T

Publications (1)

Publication Number Publication Date
CA211987A true CA211987A (en) 1921-05-31

Family

ID=35105766

Family Applications (1)

Application Number Title Priority Date Filing Date
CA211987A Expired CA211987A (en) Practice keyboard

Country Status (1)

Country Link
CA (1) CA211987A (en)

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