Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| PP5661 | Chrysanthemum plant named Goldmine | by Saundra J. Meek, executrix, William E. Duffett, Grace H. Mack | 1986-02-11 |
| PP5338 | Chrysanthemum plant named Grenadine | Saundra J. Meek, executrix by, William E. Duffett, Grace H. Mack | 1984-11-13 |
| PP5326 | Chrysanthemum plant named Viking | by Saundra J. Meek, executrix, William E. Duffett, Grace H. Mack | 1984-11-06 |
| PP5192 | Chrysanthemum plant | by Saundra J. Meek, executrix, William E. Duffett | 1984-02-14 |
| PP5107 | Chrysanthemum plant | by Saundra J. Meek, executrix, William E. Duffett | 1983-09-20 |
| PP5028 | Chrysanthemum plant | William E. Duffett | 1983-04-05 |
| PP4973 | Chrysanthemum plant | William E. Duffett | 1983-01-11 |
| PP4959 | Chrysanthemum plant | William E. Duffett | 1982-11-30 |
| PP4960 | Chrysanthemum plant | William E. Duffett | 1982-11-30 |
| PP4921 | Chrysanthemum plant | William E. Duffett | 1982-11-02 |
| PP4897 | Chrysanthemum plant | William E. Duffett | 1982-10-19 |
| PP4883 | Chrysanthemum plant | William E. Duffett | 1982-08-31 |
| PP4783 | Carnation plant | — | 1981-10-27 |
| PP4764 | Chrysanthemum plant | William E. Duffett | 1981-09-08 |
| PP4722 | Chrysanthemum plant | William E. Duffett | 1981-05-19 |
| PP4716 | Chrysanthemum plant | William E. Duffett | 1981-05-12 |
| PP4696 | Chrysanthemum plant | William E. Duffett | 1981-04-21 |
| PP4692 | Chrysanthemum plant | William E. Duffett | 1981-04-14 |
| PP4584 | Chrysanthemum plant | William E. Duffett | 1980-07-29 |
| PP4586 | Chrysanthemum plant | William E. Duffett | 1980-07-29 |
| PP4585 | Chrysanthemum plant | William E. Duffett | 1980-07-29 |
| PP4544 | Chrysanthemum plant cultivar name: Stripes | William E. Duffett | 1980-06-10 |
| PP4529 | Chrysanthemum plant | William E. Duffett | 1980-04-29 |
| PP4526 | Chrysanthemum plant | William E. Duffett | 1980-04-29 |
| PP4492 | Chrysanthemum plant | William E. Duffett | 1980-01-08 |