Whetstone

Details Whetstone Whetstone

1985-03-05

1988-05-17

Kemper, Catherine E.

Tools and hardware

Other tools and implements

Abrading

Patent

active

D02957167

REFERENCES:
patent: D91979 (1934-04-01), Blake
patent: D188124 (1960-06-01), Cowley et al.
patent: D227733 (1973-07-01), Baer
patent: D231428 (1974-04-01), Scott
patent: D240705 (1976-07-01), Franzen et al.
patent: D248729 (1978-08-01), Gunzner
patent: D250452 (1978-12-01), Heischman
patent: D265545 (1982-07-01), Rueb
patent: 1066340 (1913-07-01), Thomas

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