Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6431789 | Method and apparatus for adjusting fiberglass manholes | William A. Schneider, Robert B. Sergent, JR. | 2002-08-13 |
| 6056137 | Retrofit underground storage tank and method for making the same | Edward B. Cannan, Jr., Michael Blackmar, Larry D. Lumpkin, John C. King, Stephen C. Macy | 2000-05-02 |
| 5816424 | Retrofit underground storage tank | Edward B. Cannan, Jr., Michael Blackmar, Larry D. Lumpkin, John C. King, Stephen C. Macy +1 more | 1998-10-06 |