Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D414859 | Single-piece grate bar key for stokers feeding steam generator furnaces | Jeffrey S. Mann, Ivan Semyanko | 1999-10-05 |
| D391633 | Multi-piece wide stoker key for stokers feeding steam generator furnaces | Milton A. Fong, Ivan Semyanko | 1998-03-03 |
| D391634 | One piece wide stoker key for stokers feeding steam generator furnaces | Milton A. Fong, Ivan Semyanko | 1998-03-03 |
| D390949 | Grate bar key for stokers feeding steam generator furnaces | Milton A. Fong, Ivan Semyanko | 1998-02-17 |