A. Duda & Sons, Inc.
57Patents
35Active
57Granted
52Portfolio score
Filing activity: May 20, 1974 → Dec 16, 2022 · 9 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4145980A | Seeder for planting seeds at precise intervals | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4503079A | Process for the manufacture of ethyl alcohol from citrus molasses | Emerging Cross-Sectional Technologies | 27 | Expired |
| US3977524A | Automatic celery sizer and sorter | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4430933A | Trimmer for vegetables using fixed shear bar and unsharpened rotary members cooperative therewith | Human Necessities | 15 | Expired |
| US4367675A | Device for orienting and topping tapered vegetables | Human Necessities | 15 | Expired |
| US4067178A | Combined hedger-topper | Human Necessities | 13 | Expired |
| US6812385B2 | Celery named ADS-8 | Human Necessities | 9 | Expired |
| US8598425B2 | Celery cultivar ADS-23 | Human Necessities | 8 | Active |
| US7365248B2 | Celery named ADS-2 | Human Necessities | 7 | Expired |
| US3974725A | High volume cutter for elongate food products | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7351883B2 | Radish cultivar ADS-10 | Human Necessities | 7 | Expired |
| US4460610A | Coated fruit juice impregnated plantains | Human Necessities | 7 | Expired |
| US7429694B2 | Celery cultivar ADS-12 | Human Necessities | 6 | Active |
| US4694717A | Single pass sod cutting machine for producing hexagonally shaped plugs | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6822143B2 | Celery named ADS-1 | Human Necessities | 6 | Expired |
| US9439374B2 | Celery cultivar TBG31 | Human Necessities | 5 | Active |
| US7351887B2 | Celery cultivar ADS-11 | Human Necessities | 5 | Expired |
| US9713308B2 | Celery cultivar TBG 33 | Chemistry; Metallurgy | 5 | Active |
| US7435882B2 | Celery cultivar ADS-13 | Human Necessities | 5 | Active |
| US4402988A | Fruit juice impregnated plantains | Human Necessities | 5 | Expired |
| US8524993B2 | Celery cultivar ADS-20 | Human Necessities | 4 | Active |
| US7057099B2 | Celery named ADS-4 | Human Necessities | 4 | Expired |
| US9433162B2 | Celery cultivar TBG32 | Human Necessities | 4 | Active |
| US6967266B2 | Celery named ADS-5 | Human Necessities | 4 | Expired |
| US10440913B2 | Celery cultivar TBG 29 | Chemistry; Metallurgy | 4 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.