Slip resistant ruler

Details Slip resistant ruler Slip resistant ruler

2011-06-14

2011-06-14

Guadalupe-McCall, Yaritza (Department: 2841)

Geometrical instruments

Straightedge type

Rules

C033S485000, C033S562000

Reexamination Certificate

active

07958646

ABSTRACT:
A ruler including a slip resistant member, wherein the slip resistant member is operable to engage with a working surface to resist the sliding of the ruler when user applies force on the slip resistant member, and is disengaged from the working surface to allow the sliding of the ruler on the working surface when user releases force applied on the slip resistant member.

REFERENCES:
patent: 5471749 (1995-12-01), Brady
patent: 5615488 (1997-04-01), Brady
patent: 6314653 (2001-11-01), Iso
patent: 7043850 (2006-05-01), Brady
patent: 7191534 (2007-03-01), Szumer et al.
patent: 7484304 (2009-02-01), Campagna et al.
patent: 7509745 (2009-03-01), Schafer et al.
patent: 2007/0175052 (2007-08-01), Schafer et al.

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