Average Co-Inventor Count = 4.00
ph-index = 1
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. Hoechst Ceramtec Aktiengesellschaft (1 from 55 patents)
1 patent:
1. 5196754 - Piezoelectric tone generator and a process for producing it