Design pattern tool

Details Design pattern tool Design pattern tool

1983-03-24

1985-12-03

Ansher, Bernard

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Guide

D19 37

Patent

active

D02816130

REFERENCES:
patent: D4832 (1871-04-01), Smith
patent: D136978 (1974-01-01), Tomasini
patent: 540985 (1895-06-01), Hodges et al.
patent: 560593 (1896-05-01), Mathews
patent: 600050 (1898-03-01), Tucek
patent: 985971 (1911-03-01), Blackburn
patent: 1531119 (1925-03-01), Magnuson
patent: 1853436 (1932-04-01), Krause
patent: 2496810 (1950-02-01), Nerrie
patent: 3720706 (1955-10-01), Laine
patent: 3977683 (1976-08-01), Tomura

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