Average Co-Inventor Count = 5.00
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. Hitachi Construction Machinery Co., Ltd. (3 from 1,498 patents)
3 patents:
1. 5884589 - Cooling apparatus for heat exchanger
2. 5839397 - Engine cooling system and construction machine
3. 4881450 - Drive control system for hydraulic machine