CA415369A - Dispositif a reproduction des frequences de timbre - Google Patents

Dispositif a reproduction des frequences de timbre

Info

Publication number
CA415369A
CA415369A CA415369A CA415369DA CA415369A CA 415369 A CA415369 A CA 415369A CA 415369 A CA415369 A CA 415369A CA 415369D A CA415369D A CA 415369DA CA 415369 A CA415369 A CA 415369A
Authority
CA
Canada
Prior art keywords
reproducing device
tone frequency
frequency reproducing
tone
reproducing
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
CA415369A
Other languages
English (en)
Inventor
Karl Dale Swartzel, Jr.
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Bell Telephone Laboratories Inc
Publication date
Application granted granted Critical
Publication of CA415369A publication Critical patent/CA415369A/fr
Expired legal-status Critical Current

Links

CA415369A Dispositif a reproduction des frequences de timbre Expired CA415369A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA415369T

Publications (1)

Publication Number Publication Date
CA415369A true CA415369A (fr) 1943-09-21

Family

ID=35524576

Family Applications (1)

Application Number Title Priority Date Filing Date
CA415369A Expired CA415369A (fr) Dispositif a reproduction des frequences de timbre

Country Status (1)

Country Link
CA (1) CA415369A (fr)

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