Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5632616 | Method and apparatus for injecting air into long cement kilns | James R. Tutt, Michael P. Heap | 1997-05-27 |
| 5626665 | Cementitious systems and novel methods of making the same | Gregory S. Barger | 1997-05-06 |