NL57785C - - Google Patents
Info
- Publication number
- NL57785C NL57785C NL57785DA NL57785C NL 57785 C NL57785 C NL 57785C NL 57785D A NL57785D A NL 57785DA NL 57785 C NL57785 C NL 57785C
- Authority
- NL
- Netherlands
Links
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE223873X | 1938-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL57785C true NL57785C (xx) |
Family
ID=3866145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL57785D NL57785C (xx) | 1938-06-04 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2300613A (xx) |
| BE (1) | BE428437A (xx) |
| CH (1) | CH223873A (xx) |
| FR (1) | FR855566A (xx) |
| NL (1) | NL57785C (xx) |
Families Citing this family (2)
| 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 (xx) | |
| FR855566A (fr) | 1940-05-15 |