NL25659C - - Google Patents
Info
- Publication number
- NL25659C NL25659C NL25659DA NL25659C NL 25659 C NL25659 C NL 25659C NL 25659D A NL25659D A NL 25659DA NL 25659 C NL25659 C NL 25659C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1765276X | 1927-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL25659C true NL25659C (en:Method) |
Family
ID=19873065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL25659D NL25659C (en:Method) | 1927-12-30 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1765276A (en:Method) |
| GB (1) | GB201782A (en:Method) |
| NL (1) | NL25659C (en:Method) |
-
0
- NL NL25659D patent/NL25659C/xx active
-
1922
- 1922-08-21 GB GB22754/22A patent/GB201782A/en not_active Expired
-
1928
- 1928-01-16 US US247215A patent/US1765276A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1765276A (en) | 1930-06-17 |
| GB201782A (en) | 1923-08-09 |