FR2174641A5 - - Google Patents

Info

Publication number
FR2174641A5
FR2174641A5 FR7307549A FR7307549A FR2174641A5 FR 2174641 A5 FR2174641 A5 FR 2174641A5 FR 7307549 A FR7307549 A FR 7307549A FR 7307549 A FR7307549 A FR 7307549A FR 2174641 A5 FR2174641 A5 FR 2174641A5
Authority
FR
France
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
FR7307549A
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.)
Rank Organization Ltd
Original Assignee
Rank Organization 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 Rank Organization Ltd filed Critical Rank Organization Ltd
Application granted granted Critical
Publication of FR2174641A5 publication Critical patent/FR2174641A5/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
FR7307549A 1972-03-02 1973-03-02 Expired FR2174641A5 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK97572 1972-03-02

Publications (1)

Publication Number Publication Date
FR2174641A5 true FR2174641A5 (fr) 1973-10-12

Family

ID=8099608

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7307549A Expired FR2174641A5 (fr) 1972-03-02 1973-03-02

Country Status (3)

Country Link
JP (1) JPS4948317A (fr)
DE (1) DE2309141A1 (fr)
FR (1) FR2174641A5 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2548095C2 (de) * 1975-10-28 1985-05-09 Manfred Dipl.-Ing. 7250 Leonberg Zippel Lautsprechereinheit
SE447438B (sv) * 1981-11-26 1986-11-10 Stig Carlsson Hogtalare
JPS617230A (ja) * 1984-06-20 1986-01-13 Asahi Chem Ind Co Ltd ４−（パラフルオロベンゾイル）−２，６−ジメチルフエノ−ル及びその製造方法
US5220073A (en) * 1989-10-30 1993-06-15 Ocg Microelectronic Materials, Inc. Selected trihydroxybenzophenone compounds

Also Published As

Publication number Publication date
JPS4948317A (fr) 1974-05-10
DE2309141A1 (de) 1973-09-13

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Legal Events

Date Code Title Description
ST Notification of lapse