Average Co-Inventor Count = 2.40
ph-index = 1
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. Hei, Inc. (2 from 19 patents)
2 patents:
1. 4578569 - Multi-width card reader with cancellation feature
2. 4550250 - Cordless digital graphics input device