Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9022622 | Lighting and ventilating apparatus and method | Daniel L. Karst | 2015-05-05 |
| 8434916 | Lighting and ventilating apparatus and method | Daniel L. Karst | 2013-05-07 |
| 7455432 | Lighting and ventilating apparatus and method | Daniel L. Karst | 2008-11-25 |
| 7203416 | Ventilating and heating apparatus with heater shielded by tapered discharge duct | Daniel L. Karst, Christopher Nemacheck, Kenneth J. Jonas | 2007-04-10 |
| 7175309 | Lighting and ventilating apparatus and method | Daniel L. Karst | 2007-02-13 |
| D535433 | Ventilating and lighting assembly | Daniel L. Karst, Patrick J. Nielsen | 2007-01-16 |
| D521145 | Ventilating and heating assembly | Daniel L. Karst, Patrick J. Nielsen | 2006-05-16 |
| 6203423 | Damper flap and duct connector assembly | Daniel L. Karst | 2001-03-20 |
| 6168378 | Air deflectors to accommodate multiple size ventilator outlets | Daniel L. Karst | 2001-01-02 |