FR508678A - Improvements to telephone transmitters - Google Patents
Improvements to telephone transmittersInfo
- Publication number
- FR508678A FR508678A FR508678DA FR508678A FR 508678 A FR508678 A FR 508678A FR 508678D A FR508678D A FR 508678DA FR 508678 A FR508678 A FR 508678A
- Authority
- FR
- France
- Prior art keywords
- telephone transmitters
- transmitters
- telephone
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/14—Throat mountings for microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB226919A GB136359A (en) | 1919-01-29 | 1919-01-29 | Improvements in or relating to Telephonic Transmitters. |
Publications (1)
Publication Number | Publication Date |
---|---|
FR508678A true FR508678A (en) | 1920-10-20 |
Family
ID=32669923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR508678D Expired FR508678A (en) | 1919-01-29 | 1920-01-16 | Improvements to telephone transmitters |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR508678A (en) |
GB (1) | GB136359A (en) |
NL (1) | NL6629C (en) |
-
0
- NL NL6629D patent/NL6629C/xx active
-
1919
- 1919-01-29 GB GB226919A patent/GB136359A/en not_active Expired
-
1920
- 1920-01-16 FR FR508678D patent/FR508678A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL6629C (en) | |
GB136359A (en) | 1919-12-18 |
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