Average Co-Inventor Count = 4.36
ph-index = 2
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Life Fitness, LLC (2 from 58 patents)
2 patents:
1. 5238462 - Stair climbing exercise apparatus utilizing drive belts
2. 5135447 - Exercise apparatus for simulating stair climbing