Wheeled step stool
Description
Claims
The ornamental design for a wheeled step stool, as shown and described.
Referenced Cited
U.S. Patent Documents
D184390 | February 1959 | Cramer |
D216508 | January 1970 | Dottinger |
3559761 | February 1971 | Wehner |
3599750 | August 1971 | Serwer |
D244494 | May 31, 1977 | Dottinger |
D262419 | December 29, 1981 | Cramer |
D524069 | July 4, 2006 | Lim |
D566408 | April 15, 2008 | Gonzalez |
D566977 | April 22, 2008 | Emge |
D566978 | April 22, 2008 | Gonzalez |
D570125 | June 3, 2008 | Gonzalez |
Patent History
Patent number: D640878
Type: Grant
Filed: Feb 16, 2011
Date of Patent: Jul 5, 2011
Inventors: Chia-Ling Huang (Taichung), Chun-Lung Liu (Changhua County)
Primary Examiner: Sandra Snapp
Attorney: Muncy, Geissler, Olds & Lowe, PLLC
Application Number: 29/385,593
Type: Grant
Filed: Feb 16, 2011
Date of Patent: Jul 5, 2011
Inventors: Chia-Ling Huang (Taichung), Chun-Lung Liu (Changhua County)
Primary Examiner: Sandra Snapp
Attorney: Muncy, Geissler, Olds & Lowe, PLLC
Application Number: 29/385,593
Classifications
Current U.S. Class:
D6/350