Lewan; Derek
Patent Applications and Registrations
Patent applications and USPTO patent grants for Lewan; Derek.The latest application filed is for "insulated doors with restorable breakaway sections".
- Lewan; Derek - Dubuque IA
| Patent | Date |
|---|---|
| Insulated doors with restorable breakaway sections Grant 11,085,230 - Shanahan , et al. August 10, 2 | 2021-08-10 |
| Insulated Doors With Restorable Breakaway Sections App 20200063486 - Shanahan; Dean ; et al. | 2020-02-27 |
| Insulated doors with restorable breakaway sections Grant 10,494,858 - Shanahan , et al. De | 2019-12-03 |
| Flexible seals for insulated doors Grant 9,771,754 - Lewan , et al. September 26, 2 | 2017-09-26 |
| Insulated Doors With Restorable Breakaway Sections App 20170218683 - Shanahan; Dean ; et al. | 2017-08-03 |
| Flexible Seals For Insulated Doors App 20170130522 - Lewan; Derek ; et al. | 2017-05-11 |
| Systems and Methods for Aligning Roll-Up Door Curtains App 20160108666 - Lewan; Derek ; et al. | 2016-04-21 |
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