Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D587551 | Manual sharpener | Daniel D. Friel, Sr., Abraham Leibson, Bela Elek | 2009-03-03 |
| D567611 | Electric knife sharpener having a brushed texture housing | Bela Elek, Abraham Leibson | 2008-04-29 |
| 7287445 | Apparatus for precision steeling/conditioning of knife edges | Daniel D. Friel, Sr., Robert P. Bigliano, Abraham Leibson | 2007-10-30 |
| 7279660 | Apparatus for brewing beverages | Tom Long, Daniel D. Friel, Sr., James Fitzgerald, H. William Busch, Jr. | 2007-10-09 |
| D543430 | Electric knife sharpener | David Barr | 2007-05-29 |
| D530143 | Waffle maker | Abraham Leibson, Daniel D. Friel, Sr., Terry Hall | 2006-10-17 |
| D513682 | Food slicer | Daniel D. Friel, Sr. | 2006-01-24 |
| 6875093 | Sharpening device | Daniel D. Friel, Sr., Terry Hall | 2005-04-05 |
| 6267652 | Versatile ultrahone sharpener | Daniel D. Friel, Sr., Robert P. Bigliano | 2001-07-31 |
| 6113476 | Versatile ultrahone sharpener | Daniel D. Friel, Sr., Robert P. Bigliano | 2000-09-05 |
| 6012971 | Sharpening apparatus | Daniel D. Friel, Sr., Robert P. Bigliano | 2000-01-11 |
| D409891 | Sharpener | Abraham Leibson | 1999-05-18 |
| D408254 | Set of interlocking sharpening stones | Richard P. Wakenigg | 1999-04-20 |
| 5404679 | Portable manual sharpener for knives and the like | Samuel Weiner | 1995-04-11 |
| 5357717 | Manual file and sharpening tool | Edwin Parkell | 1994-10-25 |
| D348598 | Manual file and sharpening tool | Erwin Parkell | 1994-07-12 |
| D342003 | Portable manual knife sharpener | Samuel Weiner | 1993-12-07 |
| 5245791 | Scissor sharpening apparatus | Robert P. Bigliano, Steven J. Gluck | 1993-09-21 |