FR524219A - Rhéostat pour appareils téléphoniques - Google Patents
Rhéostat pour appareils téléphoniquesInfo
- Publication number
- FR524219A FR524219A FR524219A FR524219DA FR524219A FR 524219 A FR524219 A FR 524219A FR 524219 A FR524219 A FR 524219A FR 524219D A FR524219D A FR 524219DA FR 524219 A FR524219 A FR 524219A
- Authority
- FR
- France
- Prior art keywords
- rheostat
- telephone devices
- telephone
- devices
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/247—Telephone sets including user guidance or feature selection means facilitating their use
- H04M1/2474—Telephone terminals specially adapted for disabled people
- H04M1/2475—Telephone terminals specially adapted for disabled people for a hearing impaired user
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72475—User interfaces specially adapted for cordless or mobile telephones specially adapted for disabled users
- H04M1/72478—User interfaces specially adapted for cordless or mobile telephones specially adapted for disabled users for hearing-impaired users
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/73—Battery saving arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Otolaryngology (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Human Computer Interaction (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB24988/20A GB176019A (en) | 1920-08-30 | 1920-08-30 | Improvements in or connected with telephonic instruments |
FR524219T | 1920-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR524219A true FR524219A (fr) | 1921-08-31 |
Family
ID=10220392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR524219A Expired FR524219A (fr) | 1920-08-30 | 1920-09-14 | Rhéostat pour appareils téléphoniques |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR524219A (fr) |
GB (1) | GB176019A (fr) |
-
1920
- 1920-08-30 GB GB24988/20A patent/GB176019A/en not_active Expired
- 1920-09-14 FR FR524219A patent/FR524219A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB176019A (en) | 1922-02-28 |
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