Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4388276 | Device for regenerating hydrochloric copper chloride etching solutions | Karl Hoeck | 1983-06-14 |
| 4280887 | Method of regenerating ammoniacal etching solutions useful for etching metallic copper | — | 1981-07-28 |