Geometrical instruments – Straightedge type – Square and pivoted straightedge
Reexamination Certificate
2006-10-03
2006-10-03
Guadalupe-McCall, Yaritza (Department: 2859)
Geometrical instruments
Straightedge type
Square and pivoted straightedge
C033S474000, C033S481000
Reexamination Certificate
active
07114264
ABSTRACT:
A rafter square is provided with a triangular base plate, having a flanged base edge portion, a side edge portion, and a hypotenuse edge portion. An extension arm is selectively movable from a retracted position, closely adjacent the hypotenuse edge, to an extended position that is in-line with, but extends beyond a distal end of the side edge. Various locking mechanisms are provided for selectively locking the extension arm in either or both of its retracted or extended positions.
REFERENCES:
patent: 642888 (1900-02-01), Van Vliet
patent: 650436 (1900-05-01), Townsend et al.
patent: 1208662 (1916-12-01), Roth
patent: 5727325 (1998-03-01), Mussell
patent: 6314652 (2001-11-01), English
patent: 6725556 (2004-04-01), Graham
patent: 2003/0164078 (2003-09-01), Hiland, Jr.
Hurley Harold J.
Montgomery Rebbecca K.
Guadalupe-McCall Yaritza
Niebergall Shane M.
Thomte Mazour & Niebergall
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