Extendable level

Details Extendable level Extendable level

1988-07-14

1990-01-23

Cuchlinski, Jr., William A.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33381, 33464, G01C 928

Patent

active

048949256

ABSTRACT:
An extendable level consists of two interslidable parts having a track and slide strips in a simple construction, wherein there is always a planar relationship between the level edges. The slidable extension rests within the length of the main body when unextended.

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patent: 3889353 (1975-06-01), Provi
patent: 4130943 (1978-12-01), Talbot
patent: 4463501 (1984-08-01), Wright et al.
patent: 4607437 (1986-08-01), McSorgey, Sr. et al.
patent: 4643951 (1987-02-01), Keem et al.

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