Average Co-Inventor Count = 1.00
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. Chicago Pneumatic Tool Company (1 from 101 patents)
2. Qualitrol Corporation (1 from 25 patents)
2 patents:
1. 4168723 - Pressure relief valve
2. 3996881 - Rotary indicating instrument with magnetic reset