FR525171A - Improvements to the pavilions of telephone transmitters - Google Patents

Improvements to the pavilions of telephone transmitters

Info

Publication number
FR525171A
FR525171A FR525171A FR525171DA FR525171A FR 525171 A FR525171 A FR 525171A FR 525171 A FR525171 A FR 525171A FR 525171D A FR525171D A FR 525171DA FR 525171 A FR525171 A FR 525171A
Authority
FR
France
Prior art keywords
pavilions
telephone transmitters
transmitters
telephone
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
FR525171A
Other languages
French (fr)
Inventor
Clarence Everett Osbor Olliffe
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.)
CLARENCE EVERETT OSBORNE OLLIF
Original Assignee
CLARENCE EVERETT OSBORNE OLLIF
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 CLARENCE EVERETT OSBORNE OLLIF filed Critical CLARENCE EVERETT OSBORNE OLLIF
Application granted granted Critical
Publication of FR525171A publication Critical patent/FR525171A/en
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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/12—Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection
FR525171A 1920-08-21 1920-09-28 Improvements to the pavilions of telephone transmitters Expired FR525171A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US405201A US1365268A (en) 1920-08-21 1920-08-21 Telephone-transmitter mouthpiece
FR525171T 1920-09-28

Publications (1)

Publication Number Publication Date
FR525171A true FR525171A (en) 1921-09-16

Family

ID=23602705

Family Applications (1)

Application Number Title Priority Date Filing Date
FR525171A Expired FR525171A (en) 1920-08-21 1920-09-28 Improvements to the pavilions of telephone transmitters

Country Status (2)

Country Link
US (1) US1365268A (en)
FR (1) FR525171A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967081C (en) * 1951-04-06 1957-10-03 Fernsprech U Signalbaugesellsc Microphone

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643040A (en) * 1969-03-15 1972-02-15 Dentsu Central Kk Disinfectant for a telephone mouthpiece and a manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967081C (en) * 1951-04-06 1957-10-03 Fernsprech U Signalbaugesellsc Microphone

Also Published As

Publication number Publication date
US1365268A (en) 1921-01-11

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