FR421719A - Signal device - Google Patents

Signal device

Info

Publication number: FR421719A
Authority: FR; France
Prior art keywords: signal device; signal
Prior art date: 1910-03-07
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

French (fr)

Inventor

John Moyes

Charles Alexander Stevenson

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.)

Individual

Original Assignee

Individual

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.)

1910-03-07

Filing date

1910-10-22

Publication date

1911-03-03

1910-10-22 Application filed by Individual filed Critical Individual

1911-03-03 Application granted granted Critical

1911-03-03 Publication of FR421719A publication Critical patent/FR421719A/en

Status Expired legal-status Critical Current

Classifications

- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)

FR421719D 1910-03-07 1910-10-22 Signal device Expired FR421719A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB421719X		1910-03-07

Publications (1)

Publication Number	Publication Date
FR421719A true FR421719A (en)	1911-03-03

Family

ID=1464742

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR421719D Expired FR421719A (en)	1910-03-07	1910-10-22	Signal device

Country Status (1)

Country	Link
FR (1)	FR421719A (en)

1910
- 1910-10-22 FR FR421719D patent/FR421719A/en not_active Expired

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