U.S. patent number D421,897 [Application Number D/066,933] was granted by the patent office on 2000-03-28 for ceiling panel hold down clip. This patent grant is currently assigned to Keel Manufacturing, Inc.. Invention is credited to Noel R. Halverson, Don M. Washecheck, Michael J. Wolfe.
United States Patent | D421,897 |
Washecheck , et al. | March 28, 2000 |
Inventors: | Washecheck; Don M. (Stoughton, WI), Halverson; Noel R. (Stoughton, WI), Wolfe; Michael J. (Portage, WI) |
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Assignee: | Keel Manufacturing, Inc. (Sun
Prairie, WI) |
Appl. No.: | D/066,933 |
Filed: | February 21, 1997 |
Current U.S. Class: | D8/395 |
Current International Class: | 0808 |
Field of Search: | ;D8/394,395,396 ;52/489.1,563,772,773,712,714 |
1793127 | February 1931 | Osius |
2638191 | May 1953 | Menosky |
2845154 | July 1958 | Duffield |
3815309 | June 1974 | Olsen |
3834106 | September 1974 | Astedt et al. |
4027454 | June 1977 | Schuplin |
4858409 | August 1989 | Dunn |
4873809 | October 1989 | Paul |
Label and picture showing Clamp for suspended ceiling manufactured by Convenience Concepts, Inc. of Addison, Illinois. (date unknown).. |
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