Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8350176 | Method of forming, inserting and permanently bonding ribs in boiler tubes | George B. Watson, John Hainsworth, James M. Tanzosh, Douglas D. Zeigler | 2013-01-08 |
| 6503340 | Method for producing chromium carbide coatings | Michael Gold, Douglas D. Zeigler, George H. Harth, III, James M. Tanzosh, Dale F. LaCount +1 more | 2003-01-07 |
| 6387194 | Process and composition for chromizing 400-series stainless steels | Douglas D. Zeigler, James M. Tanzosh, George H. Harth, III | 2002-05-14 |
| 5912050 | Method for chromizing small parts | Douglas D. Zeigler, James M. Tanzosh | 1999-06-15 |
| 5708692 | Measurement system for chromium content in chromized layers and the like | Dennis Connolly, Bart Stuchell | 1998-01-13 |
| 5511613 | Elongated heat exchanger tubes having internal stiffening structure | Douglas D. Zeigler | 1996-04-30 |
| 4708194 | Method and apparatus for rapidly solidifying metal employing a metallic conditioning brush | — | 1987-11-24 |
| 4643543 | Mirror optic article | Peter Roth | 1987-02-17 |