Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6056137 | Retrofit underground storage tank and method for making the same | Michael Blackmar, Edgar Clifford Crosby, III, Larry D. Lumpkin, John C. King, Stephen C. Macy | 2000-05-02 |
| 5816424 | Retrofit underground storage tank | Michael Blackmar, Edgar Clifford Crosby, III, Larry D. Lumpkin, John C. King, Stephen C. Macy +1 more | 1998-10-06 |
| 5655265 | Split strap take-up assembly method of use | William A. Schneider, E. C. Crosby | 1997-08-12 |
| 5632583 | Split bolt ring | William A. Schneider, Bithel W. Staton | 1997-05-27 |
| 5462191 | Double-walled underground storage tank | David H. Bartlow | 1995-10-31 |
| 5224621 | Double wall underground storage tank | Joseph R. Wiegand, David H. Bartlow | 1993-07-06 |