FR714881A - Improvements to television systems - Google Patents
Improvements to television systemsInfo
- Publication number
- FR714881A FR714881A FR714881DA FR714881A FR 714881 A FR714881 A FR 714881A FR 714881D A FR714881D A FR 714881DA FR 714881 A FR714881 A FR 714881A
- Authority
- FR
- France
- Prior art keywords
- television systems
- television
- systems
- 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
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Telephone Set Structure (AREA)
- Telephonic Communication Services (AREA)
- Eye Examination Apparatus (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Audible And Visible Signals (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US439986A US1805594A (en) | 1930-03-29 | 1930-03-29 | Communicating system |
US442503A US2099115A (en) | 1930-03-29 | 1930-04-08 | Communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
FR714881A true FR714881A (en) | 1931-11-30 |
Family
ID=40498202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR714881D Expired FR714881A (en) | 1930-03-29 | 1931-03-28 | Improvements to television systems |
Country Status (4)
Country | Link |
---|---|
US (2) | US1805594A (en) |
BE (1) | BE375422A (en) |
FR (1) | FR714881A (en) |
GB (2) | GB375422A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2510046A (en) * | 1947-04-18 | 1950-05-30 | Zenith Radio Corp | Radio-wire signaling system |
BE541664A (en) * | 1954-09-30 | |||
DE3009404A1 (en) * | 1980-03-12 | 1981-09-17 | Philips Patentverwaltung Gmbh, 2000 Hamburg | DEVICE FOR ADJUSTING A MOVABLE ELECTROACUTIC SOUND TRANSDUCER |
US4845636A (en) * | 1986-10-17 | 1989-07-04 | Walker Mark E | Remote transaction system |
US5202957A (en) * | 1990-08-09 | 1993-04-13 | Future Communications | Full motion video telephone system |
US20020087413A1 (en) * | 2000-09-08 | 2002-07-04 | Agent Ai, Inc. | Vending machine adapted to vend age-restricted items |
-
1930
- 1930-03-29 US US439986A patent/US1805594A/en not_active Expired - Lifetime
- 1930-04-08 US US442503A patent/US2099115A/en not_active Expired - Lifetime
- 1930-12-01 BE BE375422D patent/BE375422A/xx unknown
-
1931
- 1931-03-27 GB GB9425/31A patent/GB375422A/en not_active Expired
- 1931-03-28 FR FR714881D patent/FR714881A/en not_active Expired
- 1931-03-28 GB GB9470/31A patent/GB375785A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2099115A (en) | 1937-11-16 |
US1805594A (en) | 1931-05-19 |
BE375422A (en) | 1931-01-31 |
GB375422A (en) | 1932-06-27 |
GB375785A (en) | 1932-06-28 |
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