Inventor
MORTENSON CARL N
15 patents
Patents
15 patentsUS5253410AOct 19, 1993
Retractable underbody truck ramp and method of making
MAGLINE INC65 citations96
US5207439AMay 4, 1993
Improvements in hand trucks with pivotally connected, spreadable, wheel-supported, auxiliary support frames
MAGLINE INC60 citations96
US5167246ADec 1, 1992
Rapidly erectable and strikeable shelter frame system and methods of erecting and striking such systems
MAGLINE INC99 citations96
US4078676AMar 14, 1978
Self storing lift gate assembly
MAGLINE INC55 citations96
US5393081AFeb 28, 1995
Hand truck assemblies and methods of constructing and operating them
MAGLINE INC31 citations92
US5199150AApr 6, 1993
Method of constructing a retractable underbody truck ramp
MAGLINE INC28 citations92
US5042827AAug 27, 1991
Automatically shifting stair climber structure for a repositionable hand truck
MAGLINE INC28 citations92
US4762333AAug 9, 1988
Repositionable hand truck
MAGLINE INC49 citations92
US4563014AJan 7, 1986
Two-wheeled hand trucks
MAGLINE INC28 citations92
US3997182ADec 14, 1976
Two-wheeled hand trucks
MAGLINE INC39 citations92
US4275894AJun 30, 1981
Hand truck construction assembly
MAGLINE INC27 citations82
US4121855AOct 24, 1978
Hand truck construction
MAGLINE INC29 citations82
US4790547ADec 13, 1988
Two-wheeled hand truck construction
MAGLINE INC8 citations73
US4420166ADec 13, 1983
Stair climber for hand trucks
MAGLINE INC15 citations65
US4865340ASep 12, 1989
Two-wheeled hand truck construction
MAGLINE INC6 citations62