Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807588 | Water permeable heat exchanger for condensing furnace | Richard M. Bentley, Chester D. Ripka | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807588 | Water permeable heat exchanger for condensing furnace | Richard M. Bentley, Chester D. Ripka | 1989-02-28 |