FR758873A - Hygienic and advertising device applicable to telephone headphones - Google Patents

Hygienic and advertising device applicable to telephone headphones

Info

Publication number
FR758873A
FR758873A FR758873DA FR758873A FR 758873 A FR758873 A FR 758873A FR 758873D A FR758873D A FR 758873DA FR 758873 A FR758873 A FR 758873A
Authority
FR
France
Prior art keywords
hygienic
advertising device
device applicable
headphones
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
Other languages
French (fr)
Inventor
Jean-Baptiste Immers
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 filed Critical
Application granted granted Critical
Publication of FR758873A publication Critical patent/FR758873A/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

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR758873D 1932-07-27 1933-07-24 Hygienic and advertising device applicable to telephone headphones Expired FR758873A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE758873X 1932-07-27

Publications (1)

Publication Number Publication Date
FR758873A true FR758873A (en) 1934-01-24

Family

ID=3879838

Family Applications (1)

Application Number Title Priority Date Filing Date
FR758873D Expired FR758873A (en) 1932-07-27 1933-07-24 Hygienic and advertising device applicable to telephone headphones

Country Status (2)

Country Link
BE (1) BE390065A (en)
FR (1) FR758873A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2723676A1 (en) * 1994-08-09 1996-02-16 Gourdain Daniel ANTI-POLLUTION DEVICE FOR TELEPHONE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2723676A1 (en) * 1994-08-09 1996-02-16 Gourdain Daniel ANTI-POLLUTION DEVICE FOR TELEPHONE
WO1996005710A1 (en) * 1994-08-09 1996-02-22 Alain Gourdain Anti-polluting telephone device

Also Published As

Publication number Publication date
BE390065A (en)

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