Visual marker

Details Visual marker Visual marker

1981-02-23

1983-10-04

Kemper, Catherine E.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Visual

D20 10, D1006

Patent

active

D02708205

REFERENCES:
patent: D218367 (1970-08-01), Parduhn
patent: D220408 (1971-04-01), Nygaard
patent: D235745 (1975-07-01), England

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