Average Co-Inventor Count = 1.14
ph-index = 3
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. The University of Tokyo (2 from 1,290 patents)
2. Tokyo University (1 from 3 patents)
3. J.p. Sports Institute Inc. (1 from 1 patent)
4 patents:
1. 6605021 - Positionable-axle bicycle ergometer
2. 6186910 - Swing training machine
3. 5935087 - Sitting-posture body anteflexion measuring device
4. 5683330 - Sprint training machine