Average Co-Inventor Count = 1.50
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. Sanko Co., Ltd. (2 from 31 patents)
2 patents:
1. 4029164 - Movable apparatus adhering to the surface of a wall
2. 3958652 - Apparatus movably adhering to a wall and adapted to carry a cleaning