NL22278C - - Google Patents
Info
- Publication number
- NL22278C NL22278C NL22278DA NL22278C NL 22278 C NL22278 C NL 22278C NL 22278D A NL22278D A NL 22278DA NL 22278 C NL22278 C NL 22278C
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- 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
- H04R7/12—Non-planar diaphragms or cones
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US702455A US1795214A (en) | 1924-03-27 | 1924-03-27 | Sound-reproducing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL22278C true NL22278C (https=) |
Family
ID=24821287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL22278D NL22278C (https=) | 1924-03-27 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1795214A (https=) |
| NL (1) | NL22278C (https=) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2770681A (en) * | 1951-10-23 | 1956-11-13 | Rola Company Inc | Loud-speaker |
-
0
- NL NL22278D patent/NL22278C/xx active
-
1924
- 1924-03-27 US US702455A patent/US1795214A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1795214A (en) | 1931-03-03 |