Average Co-Inventor Count = 1.50
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. Mattel, Inc. (3 from 1,702 patents)
3 patents:
1. 4568305 - Toy railroad vehicle brake system
2. 3982844 - Tape fastening system
3. 3930333 - Coupling member for a toy vehicle drive system