Memjet Sues HP for Alleging Patent Infringement

Memjet announced it has sued Hewlett-Packard (HP) Company in the United States District Court for the Southern District of California, for infringing eight of its patents concerning its page-wide “waterfall” printing technology.

According to Memjet, the eight patents infringed include:

• U.S. Patent No. 6,575,549, titled “Ink Jet Fault Tolerance Using Adjacent Nozzles”
• U.S. Patent No. 6,880,914, titled “Inkjet Pagewidth Printer For High Volume Pagewidth Printing”
• U.S. Patent No. 7,156,492, titled “Modular Printhead Assembly With A Carrier Of A Metal Alloy”
• U.S. Patent No. 7,325,986, titled “Printhead Assembly with Stacked Ink Distribution Sheets”
• U.S. Patent No. 8,662,636, titled “Inkjet Printhead Having Rows Of Printhead Segments”
• U.S. Patent No. 8,678,550, titled “Printhead Assembly With Laminated Ink Distribution Stack”
• U.S. Patent No. 8,696,096, titled “Laminated Ink Supply Structure Mounted In Ink Distribution Arrangement Of An Inkjet Printer”
• U.S. Patent No. 9,056,475, titled “Inkjet Printer With Web Feed Maintenance Assembly”

The lawsuit seeks orders to cease HP from using Memjet’s patented page-wide waterfall technology without authorization, and to recover damages caused by HP’s PageWide printer products.

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