Average Co-Inventor Count = 5.00
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. Nippondenso Co., Ltd. (1 from 3,252 patents)
2. Nippon Soken, Inc. (1 from 1,600 patents)
1 patent:
1. 4678921 - Photo-electric smoke detector with light shielding electrode