Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874909 | Electrical splice connector | David C. Velke, Sr., Burton C. Leffingwell | 1989-10-17 |
| 4842535 | Gas tube electrode connector | David C. Velke, Sr., Burton C. Leffingwell | 1989-06-27 |