Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7871142 | Systems and methods for controlling ink jet pens A control circuit is provided for controlling ink jet pens having different numbers of internal select lines using external select lines that extend between the control circuit and the ink jet pens and that are shared by the ink jet pens. In one embodiment, the cont... | 01/18/2011 |
| 7798616 | Fluid ejection device metal layer layouts A fluid ejection device comprises a first metal layer and a second metallayer. The first metal layer comprises an address path portion and a nonaddress path portion. The second metal layer, which overlies the first metal layer, comprises a first portion which compri... | 09/21/2010 |
| 7240997 | Fluid ejection device metal layer layouts A fluid ejection device comprises a first metal layer and a second metallayer. The first metal layer comprises an address path portion and a nonaddress path portion. The second metal layer, which overlies the first metal layer, comprises a first portion which compri... | 07/10/2007 |
| 7048355 | High-performance, high-density ink jet printhead having multiple modes of operation The present invention includes as one embodiment an inkjet printhead including a plurality of ink drop generators configured to recieve a same color of ink and grouped into four axis groups, each of the four axis groups including a plurality of nozzles arranged alon... | 05/23/2006 |
| 7004556 | High print quality inkjet printhead Several improvements have been made in inkjet print cartridges to realize 5 ng drop weights at ejection frequencies of 18 KHz. These improvements include small nozzle openings, improved heater resistor efficiency, and better ink supply reliability. ... | 02/28/2006 |
| 6977185 | Printhead integrated circuit An integrated circuit is formed on a substrate. The integrated circuit includes a transistor formed in the substrate. The transistor has a gate that forms at least one closed-loop. The integrated circuit also includes an ejection element that is coupled to the trans... | 12/20/2005 |
| 6902252 | Fluid ejection device with staggered ink drop generators The present invention includes as one embodiment a fluid ejection device coupled to an ink supply and having multiple printing modes, including a sufficient number of ink drop generators fluidically coupled to the ink supply device and formed in the fluid ejection d... | 06/07/2005 |
| 6890064 | Energy balanced printhead design A narrow ink jet printhead having efficient FET drive circuits that are configured to compensate for parasitic resistances of power traces. The ink jet printhead further includes ground busses that overlap active regions of the FET drive circuits. ... | 05/10/2005 |
| 6883894 | Printhead with looped gate transistor structures An integrated circuit is formed on a substrate. The integrated circuit includes a transistor formed in the substrate. The transistor has a gate that forms at least one closed-loop. The integrated circuit also includes an ejection element that is coupled to the trans... | 04/26/2005 |
| 6866364 | Printhead having drop generators in staggered axis groups A fluid ejection device includes a substrate having fluid feed slots coupled to a fluid supply, and a plurality of drop generators fluidically coupled to the fluid feed slots and formed in the substrate. The plurality of drop generators are arranged in at least thre... | 03/15/2005 |
| 6860587 | Ink jet printhead An ink jet printhead includes a printhead substrate having a plurality of thin film layers and three side by side columnar arrays of drop generators formed in the printhead substrate and extending along a longitudinal extent. Each columnar array has ink drop generat... | 03/01/2005 |
| 6799822 | High quality fluid ejection device A fluid ejection device includes a substrate, drop generators formed on the substrate at a high density, primitive select lines, and a ground line. The drop generators are arranged in primitives of drop generators. Each drop generator includes a heater resistor havi... | 10/05/2004 |
| 6726311 | Energy balanced printhead design A narrow ink jet printhead having efficient FET drive circuits that are configured to compensate for parasitic resistances of power traces. The ink jet printhead further includes ground buses that overlap active regions of the FET drive circuits. ... | 04/27/2004 |
| 6722759 | Ink jet printhead An ink jet printhead includes a printhead substrate having a plurality of thin film layers and four side by side columnar arrays of drop generators formed in the printhead substrate and extending along a longitudinal extent. Each columnar array has drop generators t... | 04/20/2004 |
| 6698857 | Method and apparatus for transferring information to a printhead The present disclosure relates to an inkjet printing system that includes an inkjet printhead having a plurality of electrical contacts. The plurality of electrical contacts include address contacts and enable contacts for enabling drop generators and dri... | 03/02/2004 |
| 6644788 | Energy balanced ink jet printhead An ink jet printhead having FET drive circuits that are configured to compensate for power trace parasitic resistances.... | 11/11/2003 |
| 6585352 | Compact high-performance, high-density ink jet printhead A compact monochrome ink jet printhead having a staggered high-density arrangement of ink drop generators for high-performance printing. The present invention provides a high-performance design that enable high-resolution and high-speed printing while red... | 07/01/2003 |
| 6582042 | Method and apparatus for transferring information to a printhead The present disclosure relates to an inkjet printing system that includes an inkjet printhead having a plurality of electrical contacts. The plurality of electrical contacts include address contacts and enable contacts for enabling drop generators and dri... | 06/24/2003 |
| 6523935 | Narrow ink jet printhead A narrow ink jet printhead having four columnar arrays of ink drop generators configured for monochrome single-pass printing at a print resolution having a media axis dot spacing that is less than the columnar nozzle spacing of the ink drop generators. Th... | 02/25/2003 |
| 6491377 | High print quality printhead A high quality inkjet printhead includes a substrate having a multiplicity of heater resistors formed thereon at a density of at least six heater resistors per square millimeter. Each of the heater resistors also has a total resistance of at least 70 Ω a... | 12/10/2002 |
| 6488363 | Energy balanced printhead design A narrow ink jet printhead having efficient FET drive circuits that are configured to compensate for parasitic resistances of power traces. The ink jet printhead further includes ground busses that overlap active regions of the FET drive circuits.... | 12/03/2002 |
| 6481817 | Method and apparatus for ejecting ink The present disclosure relates to an inkjet printhead having a plurality of drop generators responsive to drive current and address signals for dispensing ink. The inkjet printhead includes first and second drop generators disposed on the printhead with e... | 11/19/2002 |
| 6478404 | Ink jet printhead An ink jet printhead having three columnar arrays of drop generators that produce drops having an drop volume that enables multi-pass printing at a print resolution that is not less than 1/(2P) dpi along a reference axis, wherein P is a drop generator pit... | 11/12/2002 |
| 6431686 | Fluid ejection device controlled by electrically isolated primitives A fluid ejection device has a first set of primitives within a first region of a substrate of the device, and a second set of primitives within a second region of the substrate. The second set of primitives is electrically isolated from said first set of ... | 08/13/2002 |
| 6422676 | Compact ink jet printhead A compact thermal ink jet printhead including a printhead substrate, a plurality of side by side columnar arrays of drop generators formed in the printhead substrate, and drive circuits formed in the printhead substrate for energizing each ink drop genera... | 07/23/2002 |
| 6412917 | Energy balanced printhead design A narrow ink jet printhead having efficient FET drive circuits that are configured to compensate for parasitic resistances of power traces. The ink jet printhead further includes ground busses that overlap active regions of the Fet drive circuits.... | 07/02/2002 |
| 6402279 | Inkjet printhead and method for the same The present disclosure relates to an inkjet printhead having a plurality of drop generators that selectively eject ink in response to activation. The inkjet printhead includes first and second drop generators disposed on the printhead. Each of the first a... | 06/11/2002 |
| 6398347 | Energy balanced ink jet printhead An ink jet printhead having FET drive circuits that are configured to compensate for power trace parasitic resistances.... | 06/04/2002 |
| 6315389 | Printhead having different center to center spacings between rows of nozzles An ink jet printhead having a plurality of columnar arrays of ink drop generators that have different center to center spacing along a reference axis. The ink jet printhead further includes ink feed slots that are each fluidically connected to only one co... | 11/13/2001 |
| 6309053 | Ink jet printhead having a ground bus that overlaps transistor active regions An ink jet printhead having a ground bus that partially overlies active regions of FET drive circuits.... | 10/30/2001 |
| 6305774 | Printhead substrate having an ink jet primitive structure that spans both edges of an ink feed channel An ink jet printhead having a first plurality of ink drop generators disposed along a first edge of an ink feed slot, and a second plurality of ink drop generators disposed along a second edge of the ink feed slot that is opposite the first edge. The ink ... | 10/23/2001 |
| 6267468 | Printhead substrate having a mixture of single and double sided elongate ink feed channels An ink jet printhead having first and second arrays of ink drop generators adjacent edges of a printhead substrate, third and fourth arrays of ink drop generators inboard of the first and second ink drop generator arrays, a first ink feed slot adjacent th... | 07/31/2001 |
| 6234598 | Shared multiple terminal ground returns for an inkjet printhead For an inkjet printing apparatus having a large number of ink ejectors, it is desirable to have as few as possible interconnections to the ink ejectors. Sharing electrical ground returns between related ink ejector primitive groups with spaced apart termi... | 05/22/2001 |
| 6190000 | Method and apparatus for masking address out failures The present disclosure relates to a method and apparatus for accomplishing inkjet printing. One aspect of the present invention is an inkjet printhead for use in an inkjet printing system for depositing ink on media. The inkjet printhead has a plurality o... | 02/20/2001 |
| 6030066 | Method and apparatus for ink jet printer color balance calibration and correction A method, for adjusting the color balance of printheads in a color printer, utilizes a matrix of image data including a reference image data set for a reference image and a plurality of color modified image data sets for plural color modified images. The ... | 02/29/2000 |
