CA107549A - Microphone de telephone - Google Patents

Microphone de telephone

Info

Publication number
CA107549A
CA107549A CA000107549A CA107549DA CA107549A CA 107549 A CA107549 A CA 107549A CA 000107549 A CA000107549 A CA 000107549A CA 107549D A CA107549D A CA 107549DA CA 107549 A CA107549 A CA 107549A
Authority
CA
Canada
Prior art keywords
telephones
microphone
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
CA000107549A
Other languages
English (en)
Inventor
Ralph Cowan Brown
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
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA107549A publication Critical patent/CA107549A/fr
Expired legal-status Critical Current

Links

CA000107549A 1907-05-20 1907-05-20 Microphone de telephone Expired CA107549A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA107549T 1907-05-20

Publications (1)

Publication Number Publication Date
CA107549A true CA107549A (fr) 1907-09-17

Family

ID=45227276

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000107549A Expired CA107549A (fr) 1907-05-20 1907-05-20 Microphone de telephone

Country Status (1)

Country Link
CA (1) CA107549A (fr)

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