Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4593706 | Producing filler material, particularly for cigarette filters | David B. Stewart | 1986-06-10 |
| 4528050 | Producing filler material, particularly for cigarette filters | Hugh M. Arther, David B. Stewart, Godfrey A. Wood | 1985-07-09 |
| 4510949 | Feeding particulate material, especially tobacco | David B. Stewart | 1985-04-16 |
| 4390032 | Cigarette ventilation control | Francis A. M. Labbe | 1983-06-28 |
| 4370942 | Perforation of web material, especially uniting paper for making ventilated filter cigarettes | John G. Dowding | 1983-02-01 |
| 4370908 | Cutting head for filter assembler | Michael E. Dealto, Joseph D. DiGiacomo, Clifford R. Marritt | 1983-02-01 |
| 4363332 | Detection of rod-like articles | Jan A. Rakowicz | 1982-12-14 |
| 4331165 | Ventilated cigarettes | David J. Farrar, Ralph W. Beck, Robert E. Williams | 1982-05-25 |
| 4290518 | Filter attachment machines | Derek H. Dyett, Ivan Yehudi Hirsh, Robert E. Williams | 1981-09-22 |
| 4184619 | Cutting device | David B. Stewart | 1980-01-22 |