Average Co-Inventor Count = 5.33
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. Shimizu Construction Co., Ltd. (2 from 116 patents)
2. Other (1 from 832,812 patents)
2 patents:
1. 5299383 - Plant cultivation method and apparatus therefor
2. 5111612 - Plant culture apparatus