NL142860B - Elektromagnetische telefoon of microfoon. - Google Patents

Elektromagnetische telefoon of microfoon.

Info

Publication number
NL142860B
NL142860B NL686808237A NL6808237A NL142860B NL 142860 B NL142860 B NL 142860B NL 686808237 A NL686808237 A NL 686808237A NL 6808237 A NL6808237 A NL 6808237A NL 142860 B NL142860 B NL 142860B
Authority
NL
Netherlands
Prior art keywords
microphone
electromagnetic telephone
telephone
electromagnetic
Prior art date
Application number
NL686808237A
Other languages
English (en)
Other versions
NL6808237A (nl
Original Assignee
Industrial Research Prod Inc
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
Priority claimed from US136220A external-priority patent/US3413424A/en
Application filed by Industrial Research Prod Inc filed Critical Industrial Research Prod Inc
Publication of NL6808237A publication Critical patent/NL6808237A/xx
Publication of NL142860B publication Critical patent/NL142860B/nl

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
NL686808237A 1961-09-06 1968-06-12 Elektromagnetische telefoon of microfoon. NL142860B (nl)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US136220A US3413424A (en) 1961-09-06 1961-09-06 Electro-acoustic transducer
NL282929 1962-09-06
US393619A US3249702A (en) 1961-09-06 1964-09-01 Transducer

Publications (2)

Publication Number Publication Date
NL6808237A NL6808237A (nl) 1968-09-25
NL142860B true NL142860B (nl) 1974-07-15

Family

ID=27351056

Family Applications (1)

Application Number Title Priority Date Filing Date
NL686808237A NL142860B (nl) 1961-09-06 1968-06-12 Elektromagnetische telefoon of microfoon.

Country Status (1)

Country Link
NL (1) NL142860B (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2661549C2 (ru) * 2016-05-16 2018-07-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Саратовский государственный технический университет имени Гагарина Ю.А."(СГТУ имени Гагарина Ю.А.) Устройство для формирования звукового сигнала

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2661549C2 (ru) * 2016-05-16 2018-07-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Саратовский государственный технический университет имени Гагарина Ю.А."(СГТУ имени Гагарина Ю.А.) Устройство для формирования звукового сигнала

Also Published As

Publication number Publication date
NL6808237A (nl) 1968-09-25

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Legal Events

Date Code Title Description
NL80 Abbreviated name of patent owner mentioned of already nullified patent

Owner name: IND RESEARCH

V4 Lapsed because of reaching the maximum lifetime of a patent