Inventor · disambiguated record
David J. Thum
Also filed as: THUM DAVID J · THUM DAVID JOSEPH
5 granted patents·486 citations·filing 1991–2003
86Inventor score
Files withLIFE FITNESS4
Top patents by PatentIndex Score
5 records- 0194US5135447AExercise apparatus for simulating stair climbingLIFE FITNESS·Filed 1991·Granted Aug 4, 1992·186 cites·180 claims
- 0292US5403252AExercise apparatus and method for simulating hill climbingLIFE FITNESS·Filed 1992·Granted Apr 4, 1995·155 cites·21 claims
- 0379US5741205AExercise apparatus pedal mechanismLIFE FITNESS·Filed 1995·Granted Apr 21, 1998·71 cites·18 claims
- 0475US5238462AStair climbing exercise apparatus utilizing drive beltsLIFE FITNESS·Filed 1991·Granted Aug 24, 1993·55 cites·15 claims
- 0572US6829864B2Threshold protective cover with hingeFiled 2003·Granted Dec 14, 2004·19 cites·18 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →