Average Co-Inventor Count = 2.00
ph-index = 1
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. Siemens Aktiengesellschaft (3 from 30,061 patents)
3 patents:
1. 7401558 - Diesel-electric locomotive
2. 7044096 - Diesel-electric locomotive
3. 6933622 - Diesel-electric locomotive and traction grouping composed of at least two diesel-electric locomotives