BE800139A - TELEPHONES, MICROPHONES AND SIMILAR DEVICES - Google Patents

TELEPHONES, MICROPHONES AND SIMILAR DEVICES

Info

Publication number
BE800139A
BE800139A BE131608A BE131608A BE800139A BE 800139 A BE800139 A BE 800139A BE 131608 A BE131608 A BE 131608A BE 131608 A BE131608 A BE 131608A BE 800139 A BE800139 A BE 800139A
Authority
BE
Belgium
Prior art keywords
microphones
telephones
similar devices
similar
devices
Prior art date
Application number
BE131608A
Other languages
French (fr)
Inventor
B H Smith
R Ogden
Original Assignee
Hygenaphon Ltd
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 Hygenaphon Ltd filed Critical Hygenaphon Ltd
Publication of BE800139A publication Critical patent/BE800139A/en

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)
  • Telephone Set Structure (AREA)
BE131608A 1972-05-30 1973-05-28 TELEPHONES, MICROPHONES AND SIMILAR DEVICES BE800139A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2514672 1972-05-30

Publications (1)

Publication Number Publication Date
BE800139A true BE800139A (en) 1973-09-17

Family

ID=10222975

Family Applications (1)

Application Number Title Priority Date Filing Date
BE131608A BE800139A (en) 1972-05-30 1973-05-28 TELEPHONES, MICROPHONES AND SIMILAR DEVICES

Country Status (6)

Country Link
AU (1) AU5812173A (en)
BE (1) BE800139A (en)
DE (1) DE2327360A1 (en)
FR (1) FR2186798B3 (en)
IT (1) IT988841B (en)
NL (1) NL7307456A (en)

Also Published As

Publication number Publication date
FR2186798B3 (en) 1976-05-21
IT988841B (en) 1975-04-30
FR2186798A1 (en) 1974-01-11
DE2327360A1 (en) 1974-01-03
NL7307456A (en) 1973-12-04
AU5812173A (en) 1975-01-16

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