Average Co-Inventor Count = 2.40
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. O&k Orenstein & Koppel Aktiengesellschaft (3 from 110 patents)
2. Orenstein-koppel Aktiengesellschaft (1 from 3 patents)
4 patents:
1. 4235327 - Escalator with driver device for carrying of transportation carts
2. 4179020 - Transporter for the transportation of pieces of baggage integrated with
3. 3964596 - Conveyor, especially autowalks for persons
4. 3945138 - Hydraulically controlled and driven bucket wheel dredge