CA432887A - Instrument telephonique - Google Patents

Instrument telephonique

Info

Publication number
CA432887A
CA432887A CA432887A CA432887DA CA432887A CA 432887 A CA432887 A CA 432887A CA 432887 A CA432887 A CA 432887A CA 432887D A CA432887D A CA 432887DA CA 432887 A CA432887 A CA 432887A
Authority
CA
Canada
Prior art keywords
telephone instrument
telephone
instrument
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
CA432887A
Other languages
English (en)
Inventor
Arthur Turnbull, Jr.
Warnke Robert
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.)
United States Instrument Corp
Original Assignee
United States Instrument Corp
Publication date
Application granted granted Critical
Publication of CA432887A publication Critical patent/CA432887A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/06—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
CA432887A Instrument telephonique Expired CA432887A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA432887T

Publications (1)

Publication Number Publication Date
CA432887A true CA432887A (fr) 1946-01-29

Family

ID=210279

Family Applications (1)

Application Number Title Priority Date Filing Date
CA432887A Expired CA432887A (fr) Instrument telephonique

Country Status (1)

Country Link
CA (1) CA432887A (fr)

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