Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4993140 | Method of making transformers and cores for transformers | Frank H. Grimes | 1991-02-19 |
| 4993141 | Method of making transformers and cores for transformers | Frank H. Grimes | 1991-02-19 |
| 4972168 | Transformers and cores for transformers | Frank H. Grimes | 1990-11-20 |
| 4892773 | Preparation of amorphous metal core for use in transformer | Terrence E. Chenoweth, Wallace L. McDonald | 1990-01-09 |
| 4761630 | Butt-lap-step core joint | Frank H. Grimes | 1988-08-02 |