Average Co-Inventor Count = 3.75
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. Nippon Kayaku Kabushiki Kaisha (2 from 775 patents)
2. Kaken Pharmaceutical Company, Ltd. (1 from 136 patents)
3. Teikoku Seiyaku Kabushiki Kaisha (1 from 23 patents)
2 patents:
1. 4919919 - Nitroglycerin spray
2. 4777046 - Sheet-like preparation