Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5811527 | Lignin composition, method of producing the same and dispersing agent for cement used the same | Toshihiro Sugiwaki, Masanobu Kawamura, Tomoyuki Nakamoto | 1998-09-22 |