Average Co-Inventor Count = 2.82
ph-index = 4
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. Matsushita Electric Industrial Co., Ltd. (4 from 27,375 patents)
4 patents:
1. 6636741 - Cellular telephone with automated redial functions
2. 6448927 - Position information system
3. 6392316 - Emergency informing apparatus
4. 6262655 - Emergency reporting system and terminal apparatus therein