BE518558A - - Google Patents

Info

Publication number: BE518558A
Authority: BE; Belgium

Application number

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.)

1952-03-20

Publication of BE518558A publication Critical patent/BE518558A/xx

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
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/999—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener with retainer, e.g. tether

BE518558D 1952-03-20 BE518558A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL310658X		1952-03-20

Publications (1)

Publication Number	Publication Date
BE518558A true BE518558A (en)

Family

ID=19783626

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE518558D BE518558A (en)	1952-03-20

Country Status (6)

Country	Link
US (1)	US2720934A (en)
BE (1)	BE518558A (en)
CH (1)	CH310658A (en)
DE (1)	DE916955C (en)
FR (1)	FR1073068A (en)
GB (1)	GB724566A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1205149B (en) *	1959-09-07	1965-11-18	Sony Corp	Tube microphone
US3517390A (en) *	1968-02-29	1970-06-23	Layne Whitehead	High power acoustic radiator
US3895688A (en) *	1972-07-31	1975-07-22	Hyroacoustics Inc	Acoustic transmitter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR541251A (en) *	1920-04-03	1922-07-25	Signal Gmbh	Device for the suppression of disturbances in acoustic reception
US2363686A (en) *	1943-10-29	1944-11-28	Harry F. Olson	Acoustic Stethoscope

0
- BE BE518558D patent/BE518558A/xx unknown
1953
- 1953-01-27 US US333497A patent/US2720934A/en not_active Expired - Lifetime
- 1953-03-17 GB GB7336/53A patent/GB724566A/en not_active Expired
- 1953-03-18 DE DEN6898A patent/DE916955C/en not_active Expired
- 1953-03-18 FR FR1073068D patent/FR1073068A/en not_active Expired
- 1953-03-18 CH CH310658D patent/CH310658A/en unknown

Also Published As

Publication number	Publication date
CH310658A (en)	1955-10-31
GB724566A (en)	1955-02-23
DE916955C (en)	1954-08-23
FR1073068A (en)	1954-09-20
US2720934A (en)	1955-10-18

Publication	Publication Date	Title
FR1094611A (en)	1955-05-23
AT192345B (en)	1957-10-10
JPS4818903B1 (en)	1973-06-09
BE517351A (en)	1953-02-28
AT173165B (en)	1952-11-25
FR999185A (en)	1952-01-25
FR998973A (en)	1952-01-24
AT192434B (en)	1957-10-25
AT198884B (en)	1958-07-25
FR55282E (en)	1952-01-09
FR999184A (en)	1952-01-25
FR999293A (en)	1952-01-29
USB272160I5 (en)
BE518550A (en)
BE513871A (en)
LU31641A1 (en)
LU31931A1 (en)	1953-03-02
BE534175A (en)	1958-07-18
BE523195A (en)
BE522321A (en)	1955-10-28
BE520143A (en)
BE519936A (en)
BE518887A (en)
BE518804A (en)
BE432307A (en)