NL28231C - - Google Patents

Info

Publication number: NL28231C
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.)

1927-04-28

Publication of NL28231C publication Critical patent/NL28231C/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
- H04R19/00—Electrostatic transducers
- H04R19/02—Loudspeakers

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Emergency Protection Circuit Devices (AREA)
Protection Of Static Devices (AREA)
Circuit For Audible Band Transducer (AREA)

NL28231D 1927-04-28 NL28231C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE289472X		1927-04-28

Publications (1)

Publication Number	Publication Date
NL28231C true NL28231C (enrdf_load_stackoverflow)

Family

ID=6059837

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL28231D NL28231C (enrdf_load_stackoverflow)	1927-04-28

Country Status (4)

Country	Link
US (1)	US1737872A (enrdf_load_stackoverflow)
FR (1)	FR653356A (enrdf_load_stackoverflow)
GB (1)	GB289472A (enrdf_load_stackoverflow)
NL (1)	NL28231C (enrdf_load_stackoverflow)

0
- NL NL28231D patent/NL28231C/xx active
1928
- 1928-04-24 FR FR653356D patent/FR653356A/fr not_active Expired
- 1928-04-26 GB GB12182/28A patent/GB289472A/en not_active Expired
- 1928-04-28 US US273633A patent/US1737872A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
FR653356A (fr)	1929-03-20
US1737872A (en)	1929-12-03
GB289472A (en)	1929-06-06

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