B61L 29 - Safety means for rail/road crossing traffic

Patents for B61L 29 - Safety means for rail/road crossing traffic (1,017)
08/1978
08/22/1978	US4108405 Light assembly and flasher circuit
05/1978
05/23/1978	US4090685 Grade crossing assembly
02/1978
02/14/1978	US4073453 Railroad warning signal device
01/1978
01/10/1978	US4067523 Laterally adjustable adapter bracket for a grade crossing gate and signal assembly
01/10/1978	US4067522 Railroad safety and warning arrangement
11/1977
11/22/1977	US4059845 Fail-safe time delay circuit
11/08/1977	US4057208 Slide cam assembly for railroad-crossing gate mechanism
11/1976
11/30/1976	US3994457 Crossing gate
10/1976
10/26/1976	US3987989 Railway signal system
08/1976
08/31/1976	US3978447 Safety transmitting device
08/31/1976	US3977634 Computer for motion sensing device setup
08/17/1976	US3974991 Railroad motion detecting and signalling system with repeater receiver
06/1976
06/22/1976	US3964704 Operating mechanism for railroad crossing gate
06/15/1976	US3963202 Grade-crossing motorist warning system
04/1976
04/27/1976	US3952978 Cantilever arm signal assembly
04/06/1976	US3949300 Emergency radio frequency warning device
03/1976
03/16/1976	US3944173 Railroad crossing motion sensing system

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