Average Co-Inventor Count = 1.00
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. Spalding & Evenflo Companies, Inc. (4 from 70 patents)
4 patents:
1. 5060944 - Tennis racket with split frame
2. 4989870 - Tennis racket
3. 4798382 - Double inverted bridge tennis racket
4. 4765620 - Racket vibration dampener combined with grommet strip