Screw anchor

Description

FIG. 1 is a side elevational view of the screw anchor showing my design

FIG. 2 is a perspective view thereof from above and

FIG. 3 is a perspective view thereof from below.

Referenced Cited
U.S. Patent Documents
D228340 September 1973 Jennings
D259171 May 12, 1981 Wallace
D262864 February 2, 1982 Schavilje et al.
3722037 March 1973 Jaeger
4312612 January 26, 1982 Thompson
4431355 February 14, 1984 Junemann
Patent History
Patent number: D285048
Type: Grant
Filed: Nov 23, 1983
Date of Patent: Aug 12, 1986
Assignee: Telefonaktiebolaget LM Ericsson (Stockholm)
Inventor: Klaus Beck (Oxelosund)
Primary Examiner: B. J. Bullock
Law Firm: Roberts, Spiecens & Cohen
Application Number: 6/555,112
Classifications
Current U.S. Class: D/8385