Average Co-Inventor Count = 2.00
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. Elephant Chain Block Co., Ltd. (2 from 40 patents)
2 patents:
1. D421172 - Hoist body of lever type
2. 5971364 - Hoist and traction apparatus