Pregnancy calculator timepiece

Details Pregnancy calculator timepiece Pregnancy calculator timepiece

1998-05-04

1999-12-28

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Watch, wristwatch or case

Combined

D10 3, 1002

Patent

active

D04180658

REFERENCES:
patent: 268902 (1882-12-01), Jacquemin
patent: D352908 (1994-11-01), Schneider
patent: D360365 (1995-07-01), Mejaski
patent: D385806 (1997-11-01), Defauw
patent: 1416605 (1922-05-01), Bulka
patent: 2014168 (1935-09-01), Canepa
patent: 2691838 (1954-10-01), Langman
patent: 2741082 (1956-04-01), Elberg
patent: 3370789 (1968-02-01), Sherman
patent: 3431722 (1969-03-01), Haas
patent: 3805430 (1974-04-01), Smader
patent: 4972393 (1990-11-01), Sase et al.

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