| Number | Date | Country | Kind |
|---|---|---|---|
| 199 33 131 | Jul 1999 | DE |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4654561 | Shelton | Mar 1987 | A |
| 4867939 | Deutch | Sep 1989 | A |
| 5773919 | Seward | Jun 1998 | A |
| 5818891 | Rayburn et al. | Oct 1998 | A |
| 5977554 | Smith et al. | Nov 1999 | A |
| Entry |
|---|
| Curt Suplee; The Washington Post; Taming Anti-Atoms; 2 pages; May 13, 1996.* |
| Article derived from the web on “Antimatter Space Propulsion at Penn University (LEPS)”, publication date Jun. 21, 1999, 2 pages with cover sheet. |
| Article derived from the web on “Advanced Propulsion Concepts” for Portable Antiproton Penning Trap., 6 pages, no date. |