Average Co-Inventor Count = 1.85
ph-index = 4
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. Raybestos-manhattan Inc. (3 from 18 patents)
2. Raymark Corporation (1 from 1 patent)
4 patents:
1. 4384640 - Friction material for clutch facings and the like
2. 4349595 - Friction material for clutch facings and the like
3. 4320823 - Friction members formed from compositions containing aramid fibers and
4. 4244994 - Laminated aramid fiber friction members