Average Co-Inventor Count = 3.00
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 Metals, Ltd. (1 from 2,333 patents)
2. Shoei Manufacturing Co., Ltd. (1 from 2 patents)
3. San-in Sanso Co., Ltd. (1 from 1 patent)
1 patent:
1. 4834550 - Apparatus for testing heat-insulating tubular member