Average Co-Inventor Count = 1.20
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. Nihon Beru-haueru Kabushiki Kaisha (bell and Howell Japan, Ltd.) (2 from 15 patents)
2. Nihon Beru-haueru Kabushiki Kaisha (1 from 11 patents)
3 patents:
1. 4171890 - Dichroic rangefinder
2. 4090783 - Pinch roller actuating device
3. 3958868 - Sound system pinch roller actuating device