FRANK J WAPNER
Broker in Springfield, MA
License number
Massachusetts 15322
Issued Date
Jan 1, 1970
Expiration Date
Oct 10, 1981
Type
Salesperson
Address
Address
Springfield, MA
Professional information
Stair Lift
US Patent:
4915573, Apr 10, 1990
Filed:
Sep 6, 1988
Appl. No.:
7/240677
Inventors:
Frank J. Wapner - Springfield MA
Shirley E. Wapner - Springfield MA
Shirley E. Wapner - Springfield MA
International Classification:
B60P 100
US Classification:
414540
Abstract:
A stair lift incorporates a pair of power jacks linked to a stair or step and associated with a vehicle such as a trailer adjacent the vehicle doorway, with the jacks operating in tandem to raise or lower the stair or step with a person standing thereon.