Average Co-Inventor Count = 2.26
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. Graphtec Corporation (4 from 32 patents)
2. Mitsubishi Denki Kabushiki Kaisha (2 from 21,351 patents)
3. Mitsubishi Pencil Company, Limited (2 from 383 patents)
4. Luma Telecom Incorporated (1 from 6 patents)
8 patents:
1. D977002 - X-Y plotter for cutting
2. D972006 - X-Y plotter for cutting
3. D951341 - X-Y plotter for cutting
4. 9994066 - Erasing implement and writing implement provided with erasing implement
5. 9519255 - Label printer
6. 9409438 - Writing instrument with erasing member
7. 4962521 - Apparatus for still picture video telephone apparatus and methods for
8. 4943994 - Still picture picturephone communications system