Average Co-Inventor Count = 1.20
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. Caterpillar Tractor Co. (4 from 1,981 patents)
2. Other (1 from 832,966 patents)
3. Noel Penny Turbines Limited (1 from 2 patents)
6 patents:
1. 4137706 - Engine in which fuel is reacted in a plurality of stages
2. 4124060 - Rotor
3. 4044629 - Reciprocating piston machine
4. 4029444 - Sealing bolt seat for rotary piston machine
5. 4008989 - Bolt seal for rotary piston machine
6. 3972657 - Slant axis rotary mechanism