Average Co-Inventor Count = 2.14
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. Mitsubishi Denki Kabushiki Kaisha (5 from 21,351 patents)
5 patents:
1. D275486 - Elevator hoisting engine
2. D275485 - Elevator hoisting engine
3. D275288 - Elevator hoisting engine
4. D275198 - Elevator hoisting engine
5. 4465162 - Elevator drive apparatus using a traction-type speed change gear