Portable timer

Details Portable timer Portable timer

1977-06-23

1979-08-14

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

D10 15, D10 30, D1003

Patent

active

D02526140

REFERENCES:
patent: D212493 (1968-10-01), Newman
patent: D224130 (1972-07-01), Swanson
patent: D235516 (1975-06-01), Nagata
patent: D235519 (1975-06-01), Nagata
patent: 4027470 (1977-06-01), Friedman

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