Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11313578 | Roller member for use in an apparatus for closing Pittsburgh Seams associated with duct assemblies and other box-shaped members | Bert Michael Fischer | 2022-04-26 |
| 10976071 | Roller member for use in an apparatus for closing pittsburgh Seams associated with duct assemblies and other box-shaped members | Bert Michael Fischer | 2021-04-13 |
| 10612812 | Roller member for use in an apparatus for closing Pittsburgh seams associated with duct assemblies and other box-shaped members | Bert Michael Fischer | 2020-04-07 |
| 9981399 | Device and method for cutting insulation | Mike Fischer | 2018-05-29 |
| 9889489 | Apparatus for closing Pittsburgh seams associated with duct assemblies and other box-shaped members | Bert Michael Fischer | 2018-02-13 |
| 9623472 | Apparatus for closing pittsburgh seams associated with duct assemblies and other box-shaped members | Bert Michael Fischer | 2017-04-18 |
| 7926757 | Insulation spool apparatus for lining ductwork | Bert Michael Fischer | 2011-04-19 |
| 6810570 | Method of attaching a connector element to a duct flange | Joshua Fischer, Herbert Fischer | 2004-11-02 |
| 6460573 | Companion duct system | Joshua Fischer, Herbert Fischer | 2002-10-08 |
| 5353616 | Pittsburgh seam closer having single seaming roll | Herbert Fischer, John A. Fahland | 1994-10-11 |
| 4314735 | Bed locator having an integral electric socket and a plug ejector | Eugene H. Fullenkamp | 1982-02-09 |