NL32162C - - Google Patents

Info

Publication number: NL32162C
Authority: NL; Netherlands

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.)

1930-02-21

Publication of NL32162C publication Critical patent/NL32162C/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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

NL32162D 1930-02-21 NL32162C (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB5809/30A GB348716A (en)	1930-02-21	1930-02-21	Improvements in or relating to telephone transmitters

Publications (1)

Publication Number	Publication Date
NL32162C true NL32162C (xx)

Family

ID=9803011

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL32162D NL32162C (xx)	1930-02-21

Country Status (5)

Country	Link
US (1)	US1952889A (xx)
BE (1)	BE374582A (xx)
FR (1)	FR705756A (xx)
GB (1)	GB348716A (xx)
NL (1)	NL32162C (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5181253A (en) *	1991-01-08	1993-01-19	Southern Audio Services, Inc.	Loudspeaker assembly
US7480209B2 (en) *	2007-05-29	2009-01-20	Harris Corporation	Submersible loudspeaker assembly

0
- NL NL32162D patent/NL32162C/xx active
- BE BE374582D patent/BE374582A/xx unknown
1930
- 1930-02-21 GB GB5809/30A patent/GB348716A/en not_active Expired
- 1930-11-04 FR FR705756D patent/FR705756A/fr not_active Expired
1931
- 1931-01-06 US US506890A patent/US1952889A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
GB348716A (en)	1931-05-21
BE374582A (xx)
US1952889A (en)	1934-03-27
FR705756A (fr)	1931-06-12

Publication	Publication Date	Title
FR673485A (xx)	1930-01-17
FR674015A (xx)	1930-02-24
FR692182A (xx)	1930-10-31
FR675163A (xx)	1930-02-07
FR673510A (xx)	1930-01-18
BE366808A (xx)	1930-02-28
BE338084A (xx)
BE359251A (xx)
BE380161A (xx)
BE380928A (xx)
BE381097A (xx)	1931-08-31
BE383583A (xx)	1931-11-30
BE377368A (xx)
BE374582A (xx)
BE376482A (xx)
BE376461A (xx)
BE374873A (xx)
NL30846C (xx)
NL31767C (xx)
NL32198C (xx)
NL34823C (xx)
NL54960C (xx)
BE280490A (xx)
BE317815A (xx)
BE359241A (xx)