NL22552C - - Google Patents
Info
- Publication number
- NL22552C NL22552C NL22552DA NL22552C NL 22552 C NL22552 C NL 22552C NL 22552D A NL22552D A NL 22552DA NL 22552 C NL22552 C NL 22552C
- 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
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB21316/26A GB279587A (en) | 1926-08-30 | 1926-08-30 | Improvements in loud speakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL22552C true NL22552C (https=) |
Family
ID=10160805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL22552D NL22552C (https=) | 1926-08-30 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1716772A (https=) |
| DE (1) | DE493182C (https=) |
| FR (1) | FR640227A (https=) |
| GB (1) | GB279587A (https=) |
| NL (1) | NL22552C (https=) |
-
0
- NL NL22552D patent/NL22552C/xx active
-
1926
- 1926-08-30 GB GB21316/26A patent/GB279587A/en not_active Expired
-
1927
- 1927-08-26 US US215543A patent/US1716772A/en not_active Expired - Lifetime
- 1927-08-29 FR FR640227D patent/FR640227A/fr not_active Expired
- 1927-08-30 DE DED53775D patent/DE493182C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE493182C (de) | 1930-03-05 |
| GB279587A (en) | 1927-11-03 |
| FR640227A (fr) | 1928-07-09 |
| US1716772A (en) | 1929-06-11 |