Adjustable backrest

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Description

FIG. 1 is a front perspective view of an adjustable backrest, showing my new design; and,

FIG. 2 is a rear perspective view thereof.

Referenced Cited
U.S. Patent Documents
D238996 March 1976 Schultz
D265390 July 13, 1982 Yoshida
D300620 April 11, 1989 Cousens
480822 August 1892 Mayes
2802220 August 1957 Locke
3084978 April 1963 Johansson
3880463 April 1975 Shephard et al.
4711492 December 8, 1987 Asbjornsen et al.
4862536 September 5, 1989 Pruit
4981325 January 1, 1991 Zacharkow
Patent History
Patent number: D329771
Type: Grant
Filed: Aug 24, 1989
Date of Patent: Sep 29, 1992
Inventor: Dennis Zacharkow (Rochester, MN)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Janice E. Seeger
Attorney: Douglas L. Tschida
Application Number: 7/398,097
Classifications
Current U.S. Class: D/6502