PTO Wrapper PDF
Dossier Espace Google
Patent
   D243931
Priority
Aug 07 1975
Filed
Aug 07 1975
Issued
Apr 05 1977
Expiry
Apr 05 1991
Inventors
Pitkin, Ri…
Assg.orig
Assg.curr
Entity
unknown
Referenced by
5
References
7
Maint.:
n/a
The ornamental design for a spherical spirit level, as shown and described.

FIG. 1 is a top plan view of a spherical spirit level showing our new design;

FIG. 2 is a left end elevational view thereof the right end being a mirror image thereto;

FIG. 3 is a bottom and side perspective view thereof, the opposite side being identical thereto.

The opposite side and opposite end are identical respectively to the side and end shown in FIG. 3.
INVENTORS:

Pitkin, Richard A., Beale, Stanley T.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
7975393, Apr 07 2006 Spirit level
8109005, Jul 11 2008 C H HANSON CO Dual-globe level
D280187, Jan 07 1983 SAAB-SCANIA AKTIEBOLAG, A SWEDEN CORP Attitude-director indicator
D296085, Jun 06 1985 Angle indicator
D649884, Apr 05 2010 Endless Design, LLC Pyramidal-shaped package enclosing a pyramidal shaped leveling device
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
1277748,
1479024,
2645030,
2767483,
812251,
949842,
970360,
ASSIGNMENT RECORDS    Assignment records on the USPTO
Executed onAssignorAssigneeConveyanceFrameReelDoc
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
n/a
Date Maintenance Fee Events


n/a
Date Maintenance Schedule