Screw anchor
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Description
FIG. 1 is a top perspective view of a screw anchor showing our 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.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
| 1476837 | December 1923 | Pleister et al. |
| 3803973 | April 1974 | Rapata |
| 3869959 | March 1975 | Moen |
| 2436001 | October 1975 | DEX |
| 819041 | June 1937 | FRX |
| 140848 | September 1930 | CHX |
Patent History
Patent number: D262864
Type: Grant
Filed: Oct 9, 1979
Date of Patent: Feb 2, 1982
Assignee: Illinois Tool Works Inc. (Chicago, IL)
Inventors: John N. Schavilje (Mt. Prospect, IL), David C. Boyer (Chicago, IL)
Primary Examiner: B. J. Bullock
Attorneys: J. R. Halvorsen, T. W. Buckman
Application Number: 6/70,570
Type: Grant
Filed: Oct 9, 1979
Date of Patent: Feb 2, 1982
Assignee: Illinois Tool Works Inc. (Chicago, IL)
Inventors: John N. Schavilje (Mt. Prospect, IL), David C. Boyer (Chicago, IL)
Primary Examiner: B. J. Bullock
Attorneys: J. R. Halvorsen, T. W. Buckman
Application Number: 6/70,570
Classifications
Current U.S. Class:
D/8385
International Classification: D0808;
International Classification: D0808;
