Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9899746 | Electronically steerable single helix/spiral antenna | John E. Grandfield, Phillip Hulse, Matthew John Shea | 2018-02-20 |
| 8629811 | Dual band electrically small tunable antenna | John E. Grandfield, Brad D. Gaynor | 2014-01-14 |