Roof insulation washer
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Description
FIG. 1 is an isometric view of a roof insulation washer showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a sectional view taken in the direction of the arrows on line 3--3 of FIG. 2.
Referenced Cited
U.S. Patent Documents
| D236428 | August 1975 | Stewart et al. |
| D237681 | November 1975 | Knohl et al. |
| 3238731 | March 1966 | Seifert et al. |
| 4112693 | September 12, 1978 | Collin |
Patent History
Patent number: D263928
Type: Grant
Filed: Nov 7, 1979
Date of Patent: Apr 20, 1982
Assignee: Illinois Tool Works Inc. (Chicago, IL)
Inventor: George G. Dewey (Prospect Heights, IL)
Primary Examiner: B. J. Bullock
Attorney: Thomas W. Buckman
Application Number: 6/92,160
Type: Grant
Filed: Nov 7, 1979
Date of Patent: Apr 20, 1982
Assignee: Illinois Tool Works Inc. (Chicago, IL)
Inventor: George G. Dewey (Prospect Heights, IL)
Primary Examiner: B. J. Bullock
Attorney: Thomas W. Buckman
Application Number: 6/92,160
Classifications
Current U.S. Class:
D/8399;
D/8354
International Classification: D0808;
International Classification: D0808;
