FR7909E - - Google Patents
Info
- Publication number
- FR7909E FR7909E FR7909DA FR7909E FR 7909 E FR7909 E FR 7909E FR 7909D A FR7909D A FR 7909DA FR 7909 E FR7909 E FR 7909E
- Authority
- FR
- France
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/04—Supports for telephone transmitters or receivers
- H04M1/05—Supports for telephone transmitters or receivers specially adapted for use on head, throat or breast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R21/00—Variable-resistance transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9007T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR7909E true FR7909E (fr) |
Family
ID=8623419
Family Applications (11)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8751A Expired FR8751E (fr) | Microphone et récepteur téléphoniques | ||
| FR7909D Active FR7909E (fr) | |||
| FR4992A Expired FR4992E (fr) | Microphone et récepteur téléphoniques | ||
| FR13175A Expired FR13175E (fr) | Microphone et récepteur téléphoniques | ||
| FR5890A Expired FR5890E (fr) | Microphone et récepteur téléphoniques | ||
| FR9109D Active FR9109E (fr) | |||
| FR11485A Expired FR11485E (fr) | Procédé et dispositif pour la suppression du vacillement des soupapes | ||
| FR7177A Expired FR7177E (fr) | Microphone et récepteur téléphoniques | ||
| FR9007A Expired FR9007E (fr) | Microphone et récepteur téléphoniques | ||
| FR12980A Expired FR12980E (fr) | Microphone et récepteur téléphonique | ||
| FR342353A Expired FR342353A (fr) | 1904-04-15 | Microphone et récepteur téléphoniques |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8751A Expired FR8751E (fr) | Microphone et récepteur téléphoniques |
Family Applications After (9)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR4992A Expired FR4992E (fr) | Microphone et récepteur téléphoniques | ||
| FR13175A Expired FR13175E (fr) | Microphone et récepteur téléphoniques | ||
| FR5890A Expired FR5890E (fr) | Microphone et récepteur téléphoniques | ||
| FR9109D Active FR9109E (fr) | |||
| FR11485A Expired FR11485E (fr) | Procédé et dispositif pour la suppression du vacillement des soupapes | ||
| FR7177A Expired FR7177E (fr) | Microphone et récepteur téléphoniques | ||
| FR9007A Expired FR9007E (fr) | Microphone et récepteur téléphoniques | ||
| FR12980A Expired FR12980E (fr) | Microphone et récepteur téléphonique | ||
| FR342353A Expired FR342353A (fr) | 1904-04-15 | Microphone et récepteur téléphoniques |
Country Status (1)
| Country | Link |
|---|---|
| FR (11) | FR342353A (fr) |
-
0
- FR FR8751A patent/FR8751E/fr not_active Expired
- FR FR7909D patent/FR7909E/fr active Active
- FR FR4992A patent/FR4992E/fr not_active Expired
- FR FR13175A patent/FR13175E/fr not_active Expired
- FR FR5890A patent/FR5890E/fr not_active Expired
- FR FR9109D patent/FR9109E/fr active Active
- FR FR11485A patent/FR11485E/fr not_active Expired
- FR FR7177A patent/FR7177E/fr not_active Expired
- FR FR9007A patent/FR9007E/fr not_active Expired
- FR FR12980A patent/FR12980E/fr not_active Expired
-
1904
- 1904-04-15 FR FR342353A patent/FR342353A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR11485E (fr) | 1910-02-25 |
| FR342353A (fr) | 1904-09-06 |
| FR9109E (fr) | |
| FR4992E (fr) | 1905-11-25 |
| FR9007E (fr) | 1908-08-11 |
| FR8751E (fr) | 1908-06-23 |
| FR7177E (fr) | 1907-06-01 |
| FR13175E (fr) | 1911-02-09 |
| FR12980E (fr) | 1910-12-31 |
| FR5890E (fr) | 1906-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FR7909E (fr) |