Average Co-Inventor Count = 2.77
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. West Electric Co., Ltd. (3 from 145 patents)
3 patents:
1. 4735494 - Zoom lens control system and method for zooming control
2. 4695893 - Automatic focusing apparatus
3. 4564796 - Driving circuit for a stepping motor