Issued Patents All Time
Showing 25 most recent of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11510764 | Oral hygiene device | — | 2022-11-29 |
| 10582989 | Oral hygiene device | — | 2020-03-10 |
| 7228199 | Bulk inventory network system | — | 2007-06-05 |
| 7092897 | Bulk inventory network system | — | 2006-08-15 |
| 6672129 | Method for calibrating a sensor for measuring concentration of odors | Christopher J. Frederickson, Donald J. Hayes, David W. Taylor, Matthew Hayes | 2004-01-06 |
| 6620283 | Method for fabricating laminated carrier for collecting interstitial fluid from the skin | Donald J. Hayes, David W. Taylor | 2003-09-16 |
| 6390453 | Method and apparatus for delivery of fragrances and vapors to the nose | Christopher J. Frederickson, Donald J. Hayes, David W. Taylor, Matthew Hayes | 2002-05-21 |
| 6366829 | Bulk inventory network system (BINS) | — | 2002-04-02 |
| 6338715 | Digital olfactometer and method for testing olfactory thresholds | Donald J. Hayes, Ioan Achiriloaie, David W. Taylor, Norman Comparini | 2002-01-15 |
| 6334980 | Flexible apparatus with ablation formed chamber(s) for conducting bio-chemical analyses | Donald J. Hayes, Christopher J. Frederickson | 2002-01-01 |
| 6334851 | Method for collecting interstitial fluid from the skin | Donald J. Hayes, David W. Taylor | 2002-01-01 |
| 6325475 | Devices for presenting airborne materials to the nose | Donald J. Hayes, Christopher J. Frederickson | 2001-12-04 |
| 6170930 | Method for producing gradient tonal representation and a printhead for producing the same | — | 2001-01-09 |
| 6029896 | Method of drop size modulation with extended transition time waveform | Roger G. Self | 2000-02-29 |
| 5849208 | Making apparatus for conducting biochemical analyses | Donald J. Hayes, Christopher J. Frederickson | 1998-12-15 |
| 5772106 | Printhead for liquid metals and method of use | Scott Ayers, Donald J. Hayes, Michael T. Boldman | 1998-06-30 |
| 5736314 | Inline thermo-cycler | Donald J. Hayes, Christopher J. Frederickson | 1998-04-07 |
| 5721123 | Methods and apparatus for direct heating of biological material | Donald J. Hayes, Christopher J. Frederickson | 1998-02-24 |
| 5658802 | Method and apparatus for making miniaturized diagnostic arrays | Donald J. Hayes, Christopher J. Frederickson | 1997-08-19 |
| 5643353 | Controlling depoling and aging of piezoelectric transducers | Ronald E. Marusak | 1997-07-01 |
| 5621442 | Enhanced UU type ink jet printheads | Donald J. Hayes, John R. Pies | 1997-04-15 |
| 5581286 | Multi-channel array actuation system for an ink jet printhead | Donald J. Hayes | 1996-12-03 |
| 5554247 | Method of manufacturing a high density ink jet printhead array | John R. Pies, Donald J. Hayes | 1996-09-10 |
| 5521618 | Dual element switched digital drive system for an ink jet printhead | James L. Stortz | 1996-05-28 |
| 5461403 | Droplet volume modulation techniques for ink jet printheads | James L. Stortz | 1995-10-24 |