Average Co-Inventor Count = 3.92
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. Hitachi Industrial Equipment Systems Co., Ltd. (24 from 487 patents)
24 patents:
1. 12421972 - Liquid-feed-type gas compressor
2. 12385490 - Gas compressor
3. 12378964 - Gas compressor
4. 12313069 - Screw compressor
5. 12135032 - Screw compressor having working chamber closing member to regulate suction working medium flow to a working chamber
6. 12123413 - Screw compressor having a plurality of branch paths with intersects and central axes
7. 12110889 - Screw compressor
8. 12104599 - Liquid feed type gas compressor having a liquid supply system with first and second cooling units
9. 12078172 - Multi-stage screw compressor
10. 12031536 - Screw compressor and screw rotor
11. 12025129 - Liquid supply type screw compressor
12. 11988217 - Oil feed type air compressor
13. 11982456 - Air compressor
14. 11965510 - Compressor body and compressor to supply liquid into working chambers and whose downstream portion reaches a suction bearing chamber
15. 11933300 - Screw compressor having a screw rotor whose pitch changes in an axial direction from a suction end surface toward a discharge end surface