Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4969940 | Apparatus and method for making mineral wool from coal-ash | Charles H. Schwarb, T. Kevin Schwarb | 1990-11-13 |
| 4865112 | Method of casting metals with integral heat exchange piping | Charles H. Schwarb | 1989-09-12 |