Construction square

Details Construction square Construction square

1990-10-22

1991-11-05

Cuchlinski, Jr., William A.

Geometrical instruments

Straightedge type

Plural straightedges nonadjustably fixed at right angles

33427, 33464, B43L 700

Patent

active

050622137

ABSTRACT:
The present invention relates to an improved construction square which is both durable, simple to manufacture and use, and inexpensive, and that provides the ability to quickly tighten diverse blade configurations into proper position for use.

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patent: 4599805 (1986-07-01), Padilla
patent: 4641435 (1987-02-01), Brown
patent: 4825559 (1989-05-01), Santos
patent: 4882846 (1989-11-01), Reed

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