FR387902A - Téléphone thermique - Google Patents
Téléphone thermiqueInfo
- Publication number
- FR387902A FR387902A FR387902DA FR387902A FR 387902 A FR387902 A FR 387902A FR 387902D A FR387902D A FR 387902DA FR 387902 A FR387902 A FR 387902A
- Authority
- FR
- France
- Prior art keywords
- phone
- thermal
- thermal phone
- 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR387902T | 1907-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR387902A true FR387902A (fr) | 1908-07-28 |
Family
ID=1433610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR387902D Expired FR387902A (fr) | 1907-05-17 | 1907-05-17 | Téléphone thermique |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR387902A (fr) |
-
1907
- 1907-05-17 FR FR387902D patent/FR387902A/fr not_active Expired
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