FR714881A - Improvements to television systems - Google Patents

Improvements to television systems

Info

Publication number: FR714881A
Authority: FR; France
Prior art keywords: television systems; television; systems
Prior art date: 1930-03-29
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

Application number

Other languages

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Electrical Research Products Inc

Original Assignee

Electrical Research Products Inc

Priority date (The priority date 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 date listed.)

1930-03-29

Filing date

1931-03-28

Publication date

1931-11-30

1931-03-28 Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc

1931-11-30 Application granted granted Critical

1931-11-30 Publication of FR714881A publication Critical patent/FR714881A/en

Status Expired legal-status Critical Current

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)
Telephone Set Structure (AREA)
Eye Examination Apparatus (AREA)
Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Audible And Visible Signals (AREA)
Transforming Electric Information Into Light Information (AREA)
Telephonic Communication Services (AREA)

FR714881D 1930-03-29 1931-03-28 Improvements to television systems Expired FR714881A (en)

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)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2510046A (en) *	1947-04-18	1950-05-30	Zenith Radio Corp	Radio-wire signaling system
NL198601A (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 GB GB9470/31A patent/GB375785A/en not_active Expired
- 1931-03-28 FR FR714881D patent/FR714881A/en not_active Expired

Also Published As

Publication number	Publication date
US1805594A (en)	1931-05-19
US2099115A (en)	1937-11-16
BE375422A (en)	1931-01-31
GB375422A (en)	1932-06-27
GB375785A (en)	1932-06-28

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