Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D294565 | Voltage transformer | David N. Makinson | 1988-03-08 |
| D293431 | Current transformer | David N. Makinson | 1987-12-29 |
| D289033 | Voltage transformer | David N. Makinson | 1987-03-31 |
| D288314 | Current transformer | David N. Makinson | 1987-02-17 |