NL32898C - - Google Patents
Info
- Publication number
- NL32898C NL32898C NL32898DA NL32898C NL 32898 C NL32898 C NL 32898C NL 32898D A NL32898D A NL 32898DA NL 32898 C NL32898 C NL 32898C
- Authority
- NL
- Netherlands
Links
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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
-
- 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
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1888532X | 1930-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL32898C true NL32898C (en:Method) |
Family
ID=7747706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL32898D NL32898C (en:Method) | 1930-03-14 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1888532A (en:Method) |
| FR (1) | FR713224A (en:Method) |
| NL (1) | NL32898C (en:Method) |
-
0
- NL NL32898D patent/NL32898C/xx active
-
1931
- 1931-03-14 FR FR713224D patent/FR713224A/fr not_active Expired
- 1931-09-29 US US565887A patent/US1888532A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR713224A (fr) | 1931-10-23 |
| US1888532A (en) | 1932-11-22 |