Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878678 | High temperature metallic gasket | Christian M. Waldhelm, Henry J. Tohill, Kenneth G. Kubarych | 1989-11-07 |
| 4874290 | Turbine blade top clearance control system | John N. Cang, Joseph R. Gast, Christian M. Waldhelm | 1989-10-17 |