NL21057C - - Google Patents

Info

Publication number: NL21057C
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.)

1925-06-01

Publication of NL21057C publication Critical patent/NL21057C/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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Diaphragms For Electromechanical Transducers (AREA)

NL21057D 1925-06-01 NL21057C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US34255A US1630008A (en)	1925-06-01	1925-06-01	Cone-type loud speaker

Publications (1)

Publication Number	Publication Date
NL21057C true NL21057C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)

Family

ID=21875256

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL21057D NL21057C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)	1925-06-01

Country Status (6)

Country	Link
US (1)	US1630008A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
BE (1)	BE334366A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
DE (1)	DE551526C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
FR (1)	FR616148A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
GB (2)	GB261426A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
NL (1)	NL21057C (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2810447A (en) *	1955-05-31	1957-10-22	Ford Motor Co	Rear seat speaker
US5418337A (en) *	1993-05-28	1995-05-23	Bose Corporation	Loudspeaker driver surrounding

0
- BE BE334366D patent/BE334366A/xx unknown
- NL NL21057D patent/NL21057C/xx active
1925
- 1925-06-01 US US34255A patent/US1630008A/en not_active Expired - Lifetime
1926
- 1926-04-13 GB GB28790/26A patent/GB261426A/en not_active Expired
- 1926-04-13 GB GB9728/26A patent/GB252685A/en not_active Expired
- 1926-05-14 FR FR616148D patent/FR616148A/fr not_active Expired
- 1926-05-29 DE DEH106714D patent/DE551526C/de not_active Expired

Also Published As

Publication number	Publication date
BE334366A (c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
FR616148A (fr)	1927-01-24
DE551526C (de)	1932-06-02
GB252685A (en)	1927-06-02
US1630008A (en)	1927-05-24
GB261426A (en)	1927-04-21

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