Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5062028 | Self-contained solar powered lamp | John S. Frost, Mark R. Erickson, Bethanne Felder | 1991-10-29 |
| 4999060 | Solar cell packaging assembly for self-contained light | Klara Szekely, Bethanne Felder | 1991-03-12 |
| 4975816 | Lens for low light level lamp | John S. Frost, Mark R. Erickson, Kimberly E. Seegan, Bethanne Felder | 1990-12-04 |
| 4570351 | Book core gauge and positioning guide for casing book cores | Elmer G. Szanto, Franklin J. Davio | 1986-02-18 |