Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863555 | Tube flush etching, rinsing and drying apparatus and method | Clarence D. John, Jr. | 1989-09-05 |
| 4859276 | Tube flush etching, rinsing, drying, inspecting and plugging subsystem and method in a tube manufacturing system | Clarence D. John, Jr., Thomas Sanders | 1989-08-22 |