NL3594C - - Google Patents
Info
- Publication number
- NL3594C NL3594C NL3594DA NL3594C NL 3594 C NL3594 C NL 3594C NL 3594D A NL3594D A NL 3594DA NL 3594 C NL3594 C NL 3594C
- 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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL3594T | 1917-07-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL3594C true NL3594C (en) |
Family
ID=22922333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL3594D NL3594C (en) | 1917-07-16 | 1917-07-16 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1386744A (en) |
| FR (1) | FR490806A (en) |
| GB (1) | GB123255A (en) |
| NL (1) | NL3594C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT315264B (en) * | 1972-07-11 | 1974-05-27 | Akg Akustische Kino Geraete | Headphones for interpreting systems, language schools and the like. |
-
1917
- 1917-07-16 NL NL3594D patent/NL3594C/xx active
-
1918
- 1918-06-13 GB GB9754/18A patent/GB123255A/en not_active Expired
- 1918-07-10 FR FR490806A patent/FR490806A/en not_active Expired
- 1918-07-11 US US244342A patent/US1386744A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR490806A (en) | 1919-05-10 |
| US1386744A (en) | 1921-08-09 |
| GB123255A (en) | 1919-02-20 |