Tooth-shaped sand timer

Details Tooth-shaped sand timer Tooth-shaped sand timer

1976-05-24

1978-02-14

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

Sandglass

D1003

Patent

active

D02472252

REFERENCES:
patent: D62839 (1923-08-01), McDaniel
patent: D211894 (1968-08-01), Tokar
patent: D232213 (1974-07-01), Dobyns
patent: D232224 (1974-07-01), Dobyns
patent: D238255 (1975-12-01), Beckwith
patent: 2926487 (1960-03-01), Stone
Sunset House Gift Guide- p. 17- "Tooth" at top left.

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