CA690648A - Amplifying device for use in telephone sets - Google Patents

Amplifying device for use in telephone sets

Info

Publication number
CA690648A
CA690648A CA690648A CA690648DA CA690648A CA 690648 A CA690648 A CA 690648A CA 690648 A CA690648 A CA 690648A CA 690648D A CA690648D A CA 690648DA CA 690648 A CA690648 A CA 690648A
Authority
CA
Canada
Prior art keywords
amplifying device
telephone sets
telephone
sets
amplifying
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
CA690648A
Inventor
Schalkwijk Jan
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Publication date
Application granted granted Critical
Publication of CA690648A publication Critical patent/CA690648A/en
Expired legal-status Critical Current

Links

CA690648A Amplifying device for use in telephone sets Expired CA690648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA690648T

Publications (1)

Publication Number Publication Date
CA690648A true CA690648A (en) 1964-07-14

Family

ID=35993269

Family Applications (1)

Application Number Title Priority Date Filing Date
CA690648A Expired CA690648A (en) Amplifying device for use in telephone sets

Country Status (1)

Country Link
CA (1) CA690648A (en)

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