Average Co-Inventor Count = 1.89
ph-index = 2
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. Ricoh Company, Ltd. (3 from 28,544 patents)
3 patents:
1. 5136306 - Thermal transfer printing apparatus with movable ink transfer pulling
2. 4982201 - Thermal head
3. 4855803 - Selectively definable semiconductor device