Average Co-Inventor Count = 1.20
ph-index = 3
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 (3 from 4,237 patents)
2. Yamaha Motor Power Products Kabushiki Kaisha (1 from 36 patents)
4 patents:
1. D668184 - Four wheeled motorcycle
2. D603428 - Snow blower
3. D601464 - Pair of foot boards for four-wheeled motorcycle
4. D600165 - Pair of foot boards for four-wheeled motorcycle