Average Co-Inventor Count = 2.19
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. Hitachi, Ltd. (5 from 42,485 patents)
5 patents:
1. 6713975 - Lighting apparatus, lighting control system and home electric appliance
2. 5478401 - Apparatus and method for surface treatment
3. 5246526 - Surface treatment apparatus
4. 4842828 - Apparatus for treating surface of object with ultraviolet rays and
5. 4344018 - High pressure metal vapor discharge lamp