FR495429A - Telephone transmitter - Google Patents
Telephone transmitterInfo
- Publication number
- FR495429A FR495429A FR495429A FR495429DA FR495429A FR 495429 A FR495429 A FR 495429A FR 495429 A FR495429 A FR 495429A FR 495429D A FR495429D A FR 495429DA FR 495429 A FR495429 A FR 495429A
- Authority
- FR
- France
- Prior art keywords
- telephone transmitter
- telephone
- transmitter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Exhaust Silencers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US106093A US1342582A (en) | 1916-06-27 | 1916-06-27 | Telephone-transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
FR495429A true FR495429A (en) | 1919-10-08 |
Family
ID=22309447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR495429A Expired FR495429A (en) | 1916-06-27 | 1917-08-18 | Telephone transmitter |
Country Status (4)
Country | Link |
---|---|
US (1) | US1342582A (en) |
DE (1) | DE353757C (en) |
FR (1) | FR495429A (en) |
NL (1) | NL4427C (en) |
-
0
- NL NL4427D patent/NL4427C/xx active
-
1916
- 1916-06-27 US US106093A patent/US1342582A/en not_active Expired - Lifetime
-
1917
- 1917-08-18 FR FR495429A patent/FR495429A/en not_active Expired
-
1919
- 1919-11-15 DE DE1919353757D patent/DE353757C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE353757C (en) | 1922-05-26 |
NL4427C (en) | |
US1342582A (en) | 1920-06-08 |
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