Door operator
Description
FIG. 1 is a side elevational view of a door operator, showing my new design, the opposite side being a mirror image thereof;
FIG. 2 is a top plan view thereof;
FIG. 3 is an enlarged end elevational view, the opposite end being a mirror image thereof; and,
FIG. 4 is a bottom plan view.
Referenced Cited
U.S. Patent Documents
Other references
1043492 | November 1912 | Werner et al. |
1172561 | February 1916 | Rowntree |
1263628 | April 1918 | Vallen |
1796660 | March 1931 | Morse |
2525683 | October 1950 | Keely |
2746540 | May 1956 | Dixon |
2905463 | September 1959 | Broden |
2952312 | September 1960 | Young et al. |
3207500 | September 1965 | Kooy |
3321003 | May 1967 | Boerner |
3658112 | April 1972 | Iwaizumi |
3809144 | May 1974 | Garufo |
3872622 | March 1975 | Berk |
- Belanger Cloth Car Wash Systems Brochure D6-SM-1-81. Photographs of Prior Art Door.
Patent History
Patent number: D336523
Type: Grant
Filed: Nov 15, 1991
Date of Patent: Jun 15, 1993
Inventor: Donald E. Deroia (Shaker Heights, OH)
Primary Examiner: A. Hugo Word
Assistant Examiner: Doris V. Cole
Law Firm: Robert R. Hussey Co.
Application Number: 7/795,239
Type: Grant
Filed: Nov 15, 1991
Date of Patent: Jun 15, 1993
Inventor: Donald E. Deroia (Shaker Heights, OH)
Primary Examiner: A. Hugo Word
Assistant Examiner: Doris V. Cole
Law Firm: Robert R. Hussey Co.
Application Number: 7/795,239
Classifications
Current U.S. Class:
D25/49