Rotatable warning sign for vehicles

Details Rotatable warning sign for vehicles Rotatable warning sign for vehicles

1991-06-07

1993-01-05

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Visual

D20 21

Patent

active

D03322327

REFERENCES:
patent: D102293 (1936-12-01), Smith
patent: D143903 (1946-02-01), Dwiggins
patent: 1205800 (1916-11-01), Schwartzberg
patent: 2781017 (1957-02-01), Fuller et al.
patent: 2810223 (1957-10-01), Traesdorf, Jr.
patent: 2985976 (1961-05-01), Parker
patent: 3292569 (1966-12-01), Trigilio

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