CA21857A - Diaphragme pour telephones - Google Patents

Diaphragme pour telephones

Info

Publication number
CA21857A
CA21857A CA000021857A CA21857DA CA21857A CA 21857 A CA21857 A CA 21857A CA 000021857 A CA000021857 A CA 000021857A CA 21857D A CA21857D A CA 21857DA CA 21857 A CA21857 A CA 21857A
Authority
CA
Canada
Prior art keywords
telephones
diaphragm
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
CA000021857A
Other languages
English (en)
Inventor
Daniel G. Barnard
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 CA21857A publication Critical patent/CA21857A/fr
Expired legal-status Critical Current

Links

CA000021857A Diaphragme pour telephones Expired CA21857A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA21857T

Publications (1)

Publication Number Publication Date
CA21857A true CA21857A (fr) 1885-06-12

Family

ID=45138400

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000021857A Expired CA21857A (fr) Diaphragme pour telephones

Country Status (1)

Country Link
CA (1) CA21857A (fr)

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