Average Co-Inventor Count = 3.00
ph-index = 2
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. Tokyo Shibaura Denki Kabushiki Kaisha (2 from 2,916 patents)
2. Clarion Co (1 from 1,057 patents)
3 patents:
1. 7119752 - Antenna unit
2. 4532378 - Telephone apparatus capable of inputting character data
3. 4511764 - Telephonic display device