NL20179C - - Google Patents

Info

Publication number: NL20179C
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.)

1925-12-22

Publication of NL20179C publication Critical patent/NL20179C/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
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/02—Loudspeakers

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Multimedia (AREA)
Electromagnetism (AREA)
Diaphragms For Electromechanical Transducers (AREA)
Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

NL20179D 1925-12-22 NL20179C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US263477XA	1925-12-22	1925-12-22

Publications (1)

Publication Number	Publication Date
NL20179C true NL20179C (enrdf_load_stackoverflow)

Family

ID=21831299

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL20179D NL20179C (enrdf_load_stackoverflow)	1925-12-22

Country Status (5)

Country	Link
US (1)	US1730507A (enrdf_load_stackoverflow)
BE (1)	BE338782A (enrdf_load_stackoverflow)
FR (1)	FR616502A (enrdf_load_stackoverflow)
GB (1)	GB263477A (enrdf_load_stackoverflow)
NL (1)	NL20179C (enrdf_load_stackoverflow)

0
- NL NL20179D patent/NL20179C/xx active
- US US1730507D patent/US1730507A/en not_active Expired - Lifetime
- BE BE338782D patent/BE338782A/xx unknown
1926
- 1926-04-13 GB GB9732/26A patent/GB263477A/en not_active Expired
- 1926-05-22 FR FR616502D patent/FR616502A/fr not_active Expired

Also Published As

Publication number	Publication date
US1730507A (en)	1929-10-08
FR616502A (fr)	1927-02-03
GB263477A (en)	1927-07-13
BE338782A (enrdf_load_stackoverflow)

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