Average Co-Inventor Count = 11.00
ph-index = 1
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, Ltd. (1 from 42,517 patents)
2. Osaka Gas Company Limited (1 from 353 patents)
3. Toho Gas Co., Ltd. (1 from 21 patents)
1 patent:
1. 4841744 - Double effect air cooled absorption refrigerating machine