The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 2004
Filed:
Jan. 24, 2002
Applicant:
Inventors:
Assignee:
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B43K 2/900 ;
U.S. Cl.
CPC ...
B43K 2/900 ;
Abstract
A writing instrument, e.g., a pen, incorporates at least three color ink chambers: cyan (C), yellow (Y), and magenta (M). The ink from the three chambers can be mixed in varying ratios to provide an output ink of any conceivable color. Ink jet nozzles, preferably thermal ink jet nozzles, are used to output the ink from the chambers. The ink may be output to a mixing chamber, onto a roller ball or other transfer member, or directly to the writing medium. Consequently, the ink output by the pen can be adjusted by the user to any desired color.