Average Co-Inventor Count = 2.00
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. Yamaha Hatsudoki Kabushiki Kaisha (1 from 4,237 patents)
2. Komyo Rikagaku Kogyo K.k. (1 from 2 patents)
1 patent:
1. 7905137 - Engine oil consumption measurement device and engine oil consumption measurement method