Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10646715 | Parasympathetic activation by vagus nerve stimulation | Donald Thomas, Scott Sayers, Sanjay Singh, Raymond Dieter | 2020-05-12 |
| 5676214 | Flow channels for tooth type rolling cutter drill bits | David E. Pearce | 1997-10-14 |
| 5333684 | Downhole gas separator | Billy R. Bruton, George E. Walter | 1994-08-02 |
| 5127803 | Pump tool | — | 1992-07-07 |
| 5080183 | Seal assembly for roller cutter drill bit having a pressure balanced lubrication system | Percy W. Schumacher | 1992-01-14 |
| 5040624 | Seal assembly for roller cutter drill bit having a pressure balanced lubrication system | Percy W. Schumacher | 1991-08-20 |
| 4991671 | Means for mounting a roller cutter on a drill bit | David E. Pearce | 1991-02-12 |
| 4275623 | Hand tool | — | 1981-06-30 |