Security screw

- Wright Line Inc.
Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is an isometric view of a security screw showing my new design, the shank being partially shown to indicate indeterminate length;

FIG. 2 is a top plan view thereof; and

FIG. 3 is a side elevational view thereof, shown partially as in FIG. 1.

Referenced Cited
Foreign Patent Documents
2112949 September 1972 DEX
619623 April 1927 FRX
Patent History
Patent number: D255541
Type: Grant
Filed: Sep 7, 1978
Date of Patent: Jun 24, 1980
Assignee: Wright Line Inc. (Worcester, MA)
Inventors: James V. Simone (High Point, NC), Charles H. Olmstead (Worcester, MA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: B. J. Bullock
Attorney: Milton E. Gilbert
Application Number: 5/940,516
Classifications
Current U.S. Class: D/8387
International Classification: D0808;