Disc spring
Description
Claims
The ornamental design for a disc spring, as shown and described.
Referenced Cited
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Patent History
Patent number: D692747
Type: Grant
Filed: Mar 13, 2013
Date of Patent: Nov 5, 2013
Inventor: Pierre P. Schwab (Port St. Lucie, FL)
Primary Examiner: Cynthia Underwood
Application Number: 29/448,728
Type: Grant
Filed: Mar 13, 2013
Date of Patent: Nov 5, 2013
Inventor: Pierre P. Schwab (Port St. Lucie, FL)
Primary Examiner: Cynthia Underwood
Application Number: 29/448,728
Classifications
Current U.S. Class:
D8/399