Average Co-Inventor Count = 3.16
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. (5 from 42,485 patents)
5 patents:
1. 4870258 - Page turning apparatus
2. 4739341 - Heat sensitive transfer recording apparatus and method
3. 4667208 - Control system for a color printer
4. 4605938 - Thermal transfer recording apparatus
5. 4562443 - Thermal transfer color recording apparatus and recording method