Average Co-Inventor Count = 5.93
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. Sikorsky Aircraft Corporation (3 from 992 patents)
2. Sirorsky Aircraft Corporation (1 from 1 patent)
4 patents:
1. 10569892 - Supplemental power for reduction of prime mover
2. 8944367 - Rotary wing aircraft propulsion system
3. D524230 - Rigid coaxial rotor helicopter with auxiliary propulsion (large)
4. D524229 - Rigid coaxial rotor helicopter with auxiliary propulsion (small)