Average Co-Inventor Count = 3.27
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. Kubota Corporation (3 from 2,667 patents)
3 patents:
1. 4462273 - Change-speed apparatus for a tractor
2. 4274652 - Structure for attaching an implement to an offset-type tractor
3. 4167982 - Reinforcement frame for an offset type tractor