U.S. patent number D291,480 [Application Number 06/697,069] was granted by the patent office on 1987-08-18 for tee pipe fitting. This patent grant is currently assigned to Vassallo Research and Development Corporation. Invention is credited to Jose E. Valls, Efrain D. Vassallo.
United States Patent | D291,480 |
Vassallo , et al. | August 18, 1987 |
Inventors: | Vassallo; Efrain D. (Ponce, PR), Valls; Jose E. (Ponce, PR) |
---|---|
Assignee: | Vassallo Research and Development
Corporation (Ponce, PR) |
Appl. No.: | 06/697,069 |
Filed: | January 31, 1985 |
Current U.S. Class: | D23/263 |
Field of Search: | ;D23/40-47 ;285/150,156,177,179,231,345,369,383,423 |
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3592491 | July 1971 | Glover |
3791679 | February 1974 | Glover |
4130302 | December 1978 | Mitchell et al. |
4223896 | September 1980 | Strom |
4343480 | August 1982 | Vassallo |
4368894 | January 1983 | Parmann |
4371179 | February 1983 | Bohman |
4637618 | January 1987 | Valls |
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