Average Co-Inventor Count = 4.37
ph-index = 6
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. (7 from 27,375 patents)
7 patents:
1. D299228 - Integral telephone and answering set
2. D297935 - Telephone
3. D285553 - Telephone set with automatic dialer and speaker phone
4. D284467 - Telephone answering machine
5. D279372 - Telephone answering machine with handset
6. D251330 - Combined calculator, clock and alarm
7. D248695 - Electronic calculator