| 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 |