Average Co-Inventor Count = 3.27
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. Kabushiki Kaisha Topcon (3 from 1,033 patents)
3 patents:
1. 7739803 - Surveying system
2. 7564488 - Surveying instrument
3. 6799142 - Measuring device