Melvin C Coffman
Engineers at Elizabeth St, Denver, CO
License number
Colorado 8574
Issued Date
Mar 16, 1968
Renew Date
Aug 28, 1992
Expiration Date
Aug 28, 1992
Type
Professional Engineer
Address
Address
1326 S Elizabeth St, Denver, CO 80210
Professional information
Shaft For A Marking Instrument
US Patent:
D261901, Nov 17, 1981
Filed:
Sep 29, 1978
Appl. No.:
5/947155
Inventors:
Melvin C. Coffman - Denver CO
International Classification:
D1906
US Classification:
D19 54
Shaft For A Marking Instrument
US Patent:
D252815, Sep 4, 1979
Filed:
Aug 27, 1976
Appl. No.:
5/718314
Inventors:
Melvin C. Coffman - Denver CO
International Classification:
D1906
US Classification:
D19 54
Style Handle
US Patent:
4149811, Apr 17, 1979
Filed:
Oct 3, 1975
Appl. No.:
5/619448
Inventors:
Melvin C. Coffman - Denver CO
International Classification:
A46B 502
US Classification:
401 6
Abstract:
A style handle for writing and engraving instruments. The base portion of this style, which is gripped when in use, consists of three, essentially-flat surfaces arranged in a triadic spiral at a selected pitch conforming with an individual's finger grip when the style is held in a normal manner. So held, the edges of the spiral lie in the grooved portions between the individual's thumb and fingers with the thumb and fingers resting upon the flats of the spiral in a relaxed, natural manner. Also, the inclination of the spiral forms an abutment which permits the style to be held with less pressure when pressing it against a writing or working surface.