Average Co-Inventor Count = 2.77
ph-index = 3
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. Narita Seisakusho Mfg., Ltd. (3 from 4 patents)
2. Kawasaki Jukogyo Kabushiki Kaisha (1 from 3,336 patents)
3. Nippon Sharyo, Ltd. (1 from 51 patents)
4. Narita Mfg., Ltd. (2 patents)
3 patents:
1. 4903612 - Intercar gangway for articulated cars
2. 4765249 - Gangway construction for vehicles
3. 4736688 - Hood device for coupling cars