CA20718A - Telephone mecanique - Google Patents

Telephone mecanique

Info

Publication number
CA20718A
CA20718A CA000020718A CA20718DA CA20718A CA 20718 A CA20718 A CA 20718A CA 000020718 A CA000020718 A CA 000020718A CA 20718D A CA20718D A CA 20718DA CA 20718 A CA20718 A CA 20718A
Authority
CA
Canada
Prior art keywords
mechanical telephone
telephone
mechanical
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
CA000020718A
Other languages
English (en)
Inventor
Adolphus A. Knudson
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 CA20718A publication Critical patent/CA20718A/fr
Expired legal-status Critical Current

Links

CA000020718A Telephone mecanique Expired CA20718A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA20718T

Publications (1)

Publication Number Publication Date
CA20718A true CA20718A (fr) 1884-12-13

Family

ID=45137261

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000020718A Expired CA20718A (fr) Telephone mecanique

Country Status (1)

Country Link
CA (1) CA20718A (fr)

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