Handwriting slant measuring protractor

Details Handwriting slant measuring protractor Handwriting slant measuring protractor

1977-05-31

1979-02-20

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D1004

Patent

active

D02511134

REFERENCES:
patent: D165849 (1952-02-01), Jordan
patent: D241775 (1976-10-01), Deney
patent: 2424065 (1947-07-01), Stewart
patent: 3160961 (1964-12-01), Linehan
patent: 3894342 (1975-07-01), Goode

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