Average Co-Inventor Count = 2.86
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 Works, Ltd. (5 from 1,623 patents)
5 patents:
1. D551044 - Electric drill driver
2. D541214 - Charger
3. D539733 - Charger
4. D533422 - Electric drill driver
5. D533423 - Electric impact driver