Professional compass rulers

Details Professional compass rulers Professional compass rulers

2008-01-07

2008-12-16

Fulton, Christopher W (Department: 2841)

Geometrical instruments

Scriber

Curved line

C033S471000

Reexamination Certificate

active

07464476

ABSTRACT:
A ruler for drawing or measurement of circles, straight lines, and angles. The ruler body has a longitudinal slot in the middle and parallel with the length of the ruler. A sliding pen or pencil holder is placed within the slot for drawing or measuring. A compass is included in the combinations.

REFERENCES:
patent: 817991 (1906-04-01), Ross
patent: 964785 (1910-07-01), Johnson
patent: 972936 (1910-10-01), Smith
patent: 1011271 (1911-12-01), Tedesco
patent: 1576800 (1926-03-01), Tibony
patent: 3491448 (1970-01-01), Quinton et al.
patent: 3991474 (1976-11-01), Rath
patent: 5983509 (1999-11-01), Gosselin et al.
patent: 6405443 (2002-06-01), Thorn et al.
patent: 6606796 (2003-08-01), Stoneberg
patent: 01171995 (1989-07-01), None

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