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Patent
   D263792
Priority
Mar 21 1980
Filed
Mar 21 1980
Issued
Apr 13 1982
Expiry
Apr 13 1996
Inventors
Frieberg, …
Assg.orig
Perma-Tite…
Assg.curr
Perma-Tite…
Entity
unknown
Referenced by
11
References
4
Maint.:
n/a
The ornamental design for a lock washer, as shown and described.

FIG. 1 is a perspective view of a lock washer, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom plan view thereof.
INVENTORS:

Frieberg, Bengt O.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
11867222, Jun 11 2018 Hybrid washer
D273562, Jul 19 1982 Perma-Tite AB Transfer washer
D602349, Feb 27 2008 Nord-Lock AB Locking washer
D609999, Feb 27 2008 Nord-Lock AB Locking nut
D646153, Jul 06 2009 Nord-Lock AB Lock nut
D646154, Jul 06 2009 Nord-Lock AB Lock nut
D685035, Aug 07 2012 Maurice S. Kanbar Revocable Trust Spinning top
D696577, Oct 25 2012 Topre Corporation Self-piercing clinch nut
D696578, Oct 25 2012 Topre Corporation Self-piercing clinch nut
D698234, Feb 09 2012 Best on Bolt GmbH Washer disc
D725461, Dec 19 2013 VEGA GRIESCHABER KG Nut
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
797925,
920947,
26801,
32218,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
May 27 1988FRIEBERG, BENT, O Perma-Tite ABASSIGNMENT OF ASSIGNORS INTEREST 0048930981 pdf
Aug 30 1995L E BORDEN COMPANYFREMONT FINANCIAL CORPORATIONCOLLATERAL ASSIGNMENT OF PROPRIETARY RIGHTS AND SECURITY AGREEMENT 0076480932 pdf
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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