Dock and trailer protector

Details Dock and trailer protector Dock and trailer protector

1989-08-03

1991-09-03

Orsino, Joseph A.

Communications: electrical

Land vehicle alarms or indicators

Of collision or contact with external object

340431, 3409322, 340958, B60Q 100

Patent

active

050458345

ABSTRACT:
A warning device provides a plurality of signals as a trailer or other movable object approaches a dock or other stationary object to prevent impact which could cause damage.

REFERENCES:
patent: 2444635 (1948-07-01), Dennis, Jr.
patent: 3012225 (1961-12-01), Holt et al.
patent: 3409874 (1968-11-01), Bowler et al.
patent: 3510837 (1970-05-01), Lepore et al.
patent: 3923330 (1975-12-01), Viall, Sr. et al.
patent: 4184655 (1980-01-01), Anderberg
patent: 4249159 (1981-02-01), Stasko

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