GB2151881B - Telephone instruments - Google Patents
Telephone instrumentsInfo
- Publication number
- GB2151881B GB2151881B GB08432466A GB8432466A GB2151881B GB 2151881 B GB2151881 B GB 2151881B GB 08432466 A GB08432466 A GB 08432466A GB 8432466 A GB8432466 A GB 8432466A GB 2151881 B GB2151881 B GB 2151881B
- Authority
- GB
- United Kingdom
- Prior art keywords
- telephone instruments
- instruments
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB838334012A GB8334012D0 (en) | 1983-12-21 | 1983-12-21 | Telephone instruments |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8432466D0 GB8432466D0 (en) | 1985-02-06 |
GB2151881A GB2151881A (en) | 1985-07-24 |
GB2151881B true GB2151881B (en) | 1986-11-05 |
Family
ID=10553623
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB838334012A Pending GB8334012D0 (en) | 1983-12-21 | 1983-12-21 | Telephone instruments |
GB08432466A Expired GB2151881B (en) | 1983-12-21 | 1984-12-21 | Telephone instruments |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB838334012A Pending GB8334012D0 (en) | 1983-12-21 | 1983-12-21 | Telephone instruments |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB8334012D0 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB690296A (en) * | 1950-03-10 | 1953-04-15 | Electricity Meter Mfg Company | Improvements in loud speaking telephones |
BE539848A (en) * | 1954-07-16 | |||
GB2075304B (en) * | 1980-04-30 | 1983-09-21 | Triltronics Uk Ltd | Telephone receiving equipment |
-
1983
- 1983-12-21 GB GB838334012A patent/GB8334012D0/en active Pending
-
1984
- 1984-12-21 GB GB08432466A patent/GB2151881B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB8334012D0 (en) | 1984-02-01 |
GB2151881A (en) | 1985-07-24 |
GB8432466D0 (en) | 1985-02-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |