Average Co-Inventor Count = 1.33
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. Dorr-oliver Incorporated (2 from 139 patents)
2 patents:
1. 4115070 - Transfer pipe system
2. 4018267 - Cleaning heat exchanger tubes