Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832743 | Gold plating solutions, creams and baths | Lawrence M. Perovetz, by Terence Pickthall, executor | 1989-05-23 |
| 4798626 | Solutions and creams for silver plating and polishing | Lawrence M. Perovetz, by Terence Pickthall, executor | 1989-01-17 |