Average Co-Inventor Count = 5.00
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. Texas Instruments Corporation (3 from 29,256 patents)
3 patents:
1. 5139423 - Electronic teaching device
2. 5137457 - Electronic teaching device
3. 5135398 - Electronic teaching device