Average Co-Inventor Count = 5.74
ph-index = 5
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. Hitachi, Ltd. (6 from 42,485 patents)
6 patents:
1. D452758 - Vacuum cleaner
2. 6084239 - Electron microscope
3. 5864138 - Electron Microscope
4. D381031 - Electron microscope
5. D342502 - Television receiver
6. D336641 - Television receiver