NL70196C - - Google Patents
Info
- Publication number
- NL70196C NL70196C NL70196DA NL70196C NL 70196 C NL70196 C NL 70196C NL 70196D A NL70196D A NL 70196DA NL 70196 C NL70196 C NL 70196C
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Lasers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US783324A US2532694A (en) | 1947-10-31 | 1947-10-31 | Telephone transmitter having frustoconical back electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL70196C true NL70196C (en:Method) |
Family
ID=25128879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL70196D NL70196C (en:Method) | 1947-10-31 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2532694A (en:Method) |
| GB (1) | GB651378A (en:Method) |
| NL (1) | NL70196C (en:Method) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2607859A (en) * | 1950-12-01 | 1952-08-19 | Bell Telephone Labor Inc | Telephone transmitter |
| DE1061825B (de) * | 1954-02-26 | 1959-07-23 | Hans Widmaier | Kohlegriessmikrophon-Sprechkapsel |
| NL275488A (en:Method) * | 1961-03-02 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE402491A (en:Method) * | 1933-05-11 | |||
| US2191992A (en) * | 1937-03-31 | 1940-02-27 | Int Standard Electric Corp | Telephone transmitter |
| US2225488A (en) * | 1938-06-18 | 1940-12-17 | Bell Telephone Labor Inc | Impulse translating apparatus |
| US2404772A (en) * | 1942-12-21 | 1946-07-30 | Kellogg Switchboard & Supply | Telephone transmitter |
| BE468390A (en:Method) * | 1943-12-28 |
-
0
- NL NL70196D patent/NL70196C/xx active
-
1947
- 1947-10-31 US US783324A patent/US2532694A/en not_active Expired - Lifetime
-
1948
- 1948-10-28 GB GB28010/48A patent/GB651378A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2532694A (en) | 1950-12-05 |
| GB651378A (en) | 1951-03-14 |