NL23994C - - Google Patents
Info
- Publication number
- NL23994C NL23994C NL23994DA NL23994C NL 23994 C NL23994 C NL 23994C NL 23994D A NL23994D A NL 23994DA NL 23994 C NL23994 C NL 23994C
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US644774XA | 1926-10-01 | 1926-10-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL23994C true NL23994C (en) |
Family
ID=22056256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL23994D NL23994C (en) | 1926-10-01 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR644774A (en) |
| NL (1) | NL23994C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322583A (en) * | 1978-11-20 | 1982-03-30 | Sony Corporation | Voice coil bobbin connection to loudspeaker diaphragm of honeycomb core sandwiched by sheets |
-
0
- NL NL23994D patent/NL23994C/xx active
-
1927
- 1927-09-21 FR FR644774D patent/FR644774A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322583A (en) * | 1978-11-20 | 1982-03-30 | Sony Corporation | Voice coil bobbin connection to loudspeaker diaphragm of honeycomb core sandwiched by sheets |
Also Published As
| Publication number | Publication date |
|---|---|
| FR644774A (en) | 1928-10-13 |