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. Hayakawa Rubber Company Limited (1 from 25 patents)
2. Sanyo Turf Co., Ltd. (1 from 2 patents)
1 patent:
1. 5509230 - Lawn protecting method and elastic body for lawn protection