Portable stair
Description
Claims
The ornamental design for a portable stair, as shown.
Referenced Cited
U.S. Patent Documents
3443722 | May 1969 | Cloyd et al. |
4105117 | August 8, 1978 | Atkin et al. |
4760921 | August 2, 1988 | Licari |
4770300 | September 13, 1988 | Klein |
D307800 | May 8, 1990 | Hradisky |
4950033 | August 21, 1990 | Anderson |
D346704 | May 10, 1994 | Grosfillex |
5518084 | May 21, 1996 | Short et al. |
5641034 | June 24, 1997 | Calmeise et al. |
D449386 | October 16, 2001 | Cheris et al. |
6568506 | May 27, 2003 | Donnalley |
D485021 | January 6, 2004 | Gonzalez |
D512537 | December 6, 2005 | Barnes et al. |
Patent History
Patent number: D589630
Type: Grant
Filed: Sep 10, 2007
Date of Patent: Mar 31, 2009
Inventors: Blake D. Henson (Springdale, AR), Tim Lewis Scott (Lowell, AR), James D. Thompson (Springdale, AR)
Primary Examiner: Doris Clark
Attorney: Boyd D. Cox
Application Number: 29/291,665
Type: Grant
Filed: Sep 10, 2007
Date of Patent: Mar 31, 2009
Inventors: Blake D. Henson (Springdale, AR), Tim Lewis Scott (Lowell, AR), James D. Thompson (Springdale, AR)
Primary Examiner: Doris Clark
Attorney: Boyd D. Cox
Application Number: 29/291,665
Classifications
Current U.S. Class:
Step Stool Type (D25/65);
D6/349