NL27769C - - Google Patents

Info

Publication number: NL27769C
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.)

1928-05-05

Publication of NL27769C publication Critical patent/NL27769C/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
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers

Landscapes

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

NL27769D 1928-05-05 NL27769C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DEW79281D DE557366C (de)	1928-05-05	1928-05-05	Lautsprecher

Publications (1)

Publication Number	Publication Date
NL27769C true NL27769C (enrdf_load_stackoverflow)

Family

ID=10155069

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL27769D NL27769C (enrdf_load_stackoverflow)	1928-05-05

Country Status (5)

Country	Link
BE (1)	BE358783A (enrdf_load_stackoverflow)
DE (1)	DE557366C (enrdf_load_stackoverflow)
FR (1)	FR659604A (enrdf_load_stackoverflow)
GB (1)	GB314691A (enrdf_load_stackoverflow)
NL (1)	NL27769C (enrdf_load_stackoverflow)

0
- NL NL27769D patent/NL27769C/xx active
- BE BE358783D patent/BE358783A/xx unknown
1928
- 1928-05-05 DE DEW79281D patent/DE557366C/de not_active Expired
- 1928-07-19 GB GB2097828A patent/GB314691A/en not_active Expired
- 1928-08-28 FR FR659604D patent/FR659604A/fr not_active Expired

Also Published As

Publication number	Publication date
DE557366C (de)	1932-08-22
FR659604A (fr)	1929-07-03
BE358783A (enrdf_load_stackoverflow)
GB314691A (en)	1929-07-04

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