Average Co-Inventor Count = 3.43
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. Sperry Rand Corporation (2 from 628 patents)
2 patents:
1. 3945115 - Skin engaging means for an electric dry shaver
2. 3931675 - Electric dry shaver with releasable cutter head