Douglas Machine Inc.
62Patents
37Active
62Granted
47Portfolio score
Filing activity: Feb 12, 1993 → Feb 14, 2024 · 13 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7155876B2 | Heat tunnel for film shrinking | Performing Operations; Transporting | 54 | Expired |
| US7328550B2 | Method for packaging articles using pre-perforated heat shrink film | Emerging Cross-Sectional Technologies | 47 | Expired |
| US8051629B2 | Heat tunnel for film shrinking | Performing Operations; Transporting | 46 | Active |
| US7823366B2 | Apparatus and method for selective processing of materials with radiant energy | Performing Operations; Transporting | 46 | Active |
| US7269929B2 | Heat tunnel for film shrinking | Performing Operations; Transporting | 43 | Active |
| US5813540A | Shrink film-encased double-tiered package | Performing Operations; Transporting | 41 | Expired |
| US5352178A | Collapsed, tubular carton erecting apparatus | Performing Operations; Transporting | 29 | Expired |
| US5628614A | Continuous motion stacking apparatus and methods | Performing Operations; Transporting | 26 | Expired |
| US6843360B2 | Retractable transfer device metering apparatus and methods | Performing Operations; Transporting | 20 | Expired |
| US5771662A | Apparatus and methods for producing shrink wrap packaging | Performing Operations; Transporting | 19 | Expired |
| US7073656B2 | Method and apparatus for removing holes from nested product patterns | Performing Operations; Transporting | 16 | Expired |
| US6390276B1 | Methods and apparatus for packaging unstable products | Performing Operations; Transporting | 16 | Expired |
| US7533768B2 | Retractable transfer device metering apparatus and methods | Performing Operations; Transporting | 15 | Active |
| US6094888A | System and methods for mechanically processing bags | Physics | 14 | Expired |
| US8448777B2 | Methods and apparatus for slip sheet metering for indexing product | Performing Operations; Transporting | 13 | Active |
| US6837360B2 | Retractable transfer device metering and product arranging apparatus and methods | Performing Operations; Transporting | 13 | Expired |
| US6047527A | Loading apparatus for bag packaging system and method of operating the same | Performing Operations; Transporting | 13 | Expired |
| US6793064B2 | Retractable transfer device metering and product arranging and loading apparatus and methods | Performing Operations; Transporting | 12 | Expired |
| US8011495B2 | Transfer device metering apparatus and methods | Performing Operations; Transporting | 12 | Active |
| US7222716B2 | Retractable transfer device metering apparatus and methods | Performing Operations; Transporting | 10 | Expired |
| US9266632B1 | Split/splittable retail ready package | Performing Operations; Transporting | 10 | Active |
| US6622848B1 | Pouch reverse shingling system | Performing Operations; Transporting | 10 | Expired |
| US6837664B2 | Multiple head rotary set-up | Performing Operations; Transporting | 9 | Expired |
| US7156607B2 | Carton stacking apparatus and method | Performing Operations; Transporting | 7 | Expired |
| US5558614A | Tubular carton opening, presenting, and closing apparatus | Performing Operations; Transporting | 7 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.