Average Co-Inventor Count = 5.46
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. Other (2 from 832,680 patents)
2. Hitachi Construction Machinery Co., Ltd. (2 from 1,498 patents)
2 patents:
1. 4984567 - Apparatus for measuring intracranial pressure
2. 4971061 - Apparatus for recording intracranial pressure