NL57785C - - Google Patents

Info

Publication number: NL57785C
Authority: NL; Netherlands

Application number

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.)

1938-06-04

Publication of NL57785C publication Critical patent/NL57785C/xx

Classifications

- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Circuit Arrangement For Electric Light Sources In General (AREA)

NL57785D 1938-06-04 NL57785C (ko)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
BE223873X		1938-06-04

Publications (1)

Publication Number	Publication Date
NL57785C true NL57785C (ko)

Family

ID=3866145

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL57785D NL57785C (ko)	1938-06-04

Country Status (5)

Country	Link
US (1)	US2300613A (ko)
BE (1)	BE428437A (ko)
CH (1)	CH223873A (ko)
FR (1)	FR855566A (ko)
NL (1)	NL57785C (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2521683A (en) *	1944-06-29	1950-09-12	Eastern Ind Inc	Traffic detection apparatus
US3235738A (en) *	1962-05-14	1966-02-15	Sensi Tronics Inc	Photoelectric apparatus for detecting objects in an area

0
- BE BE428437D patent/BE428437A/xx unknown
- NL NL57785D patent/NL57785C/xx active
1939
- 1939-05-31 US US276628A patent/US2300613A/en not_active Expired - Lifetime
- 1939-05-31 CH CH223873D patent/CH223873A/fr unknown
- 1939-06-01 FR FR855566D patent/FR855566A/fr not_active Expired

Also Published As

Publication number	Publication date
US2300613A (en)	1942-11-03
CH223873A (fr)	1942-10-15
BE428437A (ko)
FR855566A (fr)	1940-05-15

Publication	Publication Date	Title
BE431482A (ko)
BE437018A (ko)
BE437366A (ko)
NL57785C (ko)
NL96289B (ko)	1942-11-16
NL88800C (ko)
NL55895C (ko)	1944-03-15
BE131681A (ko)
BE414985A (ko)
BE420003A (ko)
BE420642A (ko)
BE422629A (ko)
BE423383A (ko)
BE423866A (ko)
BE425656A (ko)
BE425826A (ko)	1938-02-28
BE425884A (ko)
BE425911A (ko)
BE426294A (ko)
BE426318A (ko)
BE426319A (ko)
BE426413A (ko)
BE426439A (ko)
BE426736A (ko)
BE426920A (ko)	1938-04-30