Inventor

STARK DUANE P

US3 patents

⚠️ This page may combine multiple inventors who share the name “STARK DUANE P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

LAGUNA TECTRIX INC

2 patents

US4949993AAug 21, 1990

Exercise apparatus having high durability mechanism for user energy transmission

LAGUNA TECTRIX INC161 citations96

US4938474AJul 3, 1990

Exercise apparatus and method which simulate stair climbing

LAGUNA TECTRIX INC143 citations95

TECTRIX FITNESS EQUIPMENT

1 patent

US5643146AJul 1, 1997

Stationary exercise device having load-controlling braking system

TECTRIX FITNESS EQUIPMENT58 citations91