FD

Frank Drogo

HP HP: 10 patents #5,870 of 16,619Top 40%
Overall (All Time): #521,435 of 4,157,543Top 15%
10
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
RE40294 Servicing system for an inkjet printhead William Wistar Rhoads, Eric Joseph Johnson, John Ferraro, Paul E. Martinson, Steven T. Castle +1 more 2008-05-06
6913338 Servicing system for an inkjet printhead W. Wistar Rhoads, Eric Joseph Johnson, Steve A. Castle, John Ferraro, Paul E. Martinson +1 more 2005-07-05
5909231 Gas flush to eliminate residual bubbles Winthrop D. Childers, Brian J. Keefe, Barbara Parcells, Shailendra Kumar, Steven L. Webb +2 more 1999-06-01
5905514 Servicing system for an inkjet printhead W. Wistar Rhoads, Eric Joseph Johnson, Steve A. Castle, John Ferraro, Paul E. Martinson +1 more 1999-05-18
5880758 Printer with pen containing a low dot spread black ink and a high dot spread color ink John L. Stoffel, Keshava A. Prasad, Ronald A. Askeland, Michele Shepard, Leonard Slevin +2 more 1999-03-09
5745140 Color ink-jet printer with pigment black and dye-based color inks John L. Stoffel, Keshava A. Prasad, Ronald A. Askeland, Michele Shepard, Leonard Slevin +2 more 1998-04-28
5726690 Control of ink drop volume in thermal inkjet printheads by varying the pulse width of the firing pulses Jaime H. Bohorquez, Clayton L. Holstun, Brian Canfield, Susan Hajaran Tousi, Kenneth J. Courian 1998-03-10
5600351 Inkjet printer with increased print resolution in the carriage scan axis Clayton L. Holstun, Ronald A. Askeland, Brian Canfield 1997-02-04
5541625 Method for increased print resolution in the carriage scan axis of an inkjet printer Clayton L. Holstun, Ronald A. Askeland, Brian Canfield 1996-07-30
5528269 Servicing a newly-installed ink pen to eliminate uneven print quality without excessive wasting of ink Ronald A. Askeland, Brian Canfield 1996-06-18