Roof insulation washer

- Illinois Tool Works Inc.
Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
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
D236790 September 1975 Bruno et al.
3090203 May 1963 Durget
4112693 September 12, 1978 Collin
Foreign Patent Documents
7415863 June 1976 NLX
Patent History
Patent number: D263927
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: 6/92,159
Classifications
Current U.S. Class: D/8399; D/8354
International Classification: D0808;