Traffic control drum

Details Traffic control drum Traffic control drum

1983-12-05

1985-06-18

Bullock, B. J.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Visual

Patent

active

D02792753

REFERENCES:
patent: D229784 (1974-01-01), Carter
patent: D237473 (1975-11-01), Fitch
patent: D270719 (1983-09-01), Porath et al.
patent: D276142 (1984-10-01), Dobrin
patent: 2957444 (1960-10-01), Boettler
patent: 3099244 (1963-07-01), Knapp

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