Average Co-Inventor Count = 1.50
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. Other (3 from 832,812 patents)
3 patents:
1. 4387142 - Granular material consisting of microporous hollow granules of lead
2. 4374908 - Tubular electrode
3. 4366214 - Sealing device