Pen maintenance system and method for operating same

United States of America Patent

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Sep 12, 2006
Grant Date
Mar 4, 2004
app pub date
Jul 30, 2003
filing date
Sep 4, 2002

priority date (Note)
Expired

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Abstract

A pen having a printhead and a chamber for holding ink; a sensor for monitoring changes in the amount of ink in the chamber; and a pump for selectively drawing ink into or expelling ink from the chamber.

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Patent Owner(s)

HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

International Classification(s)

B41J:TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. M....

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Davis, Jeremy A	Battle Ground, WA	21	228
Harper, Kit L	Vancouver, WA	10	68
Waller, David J	Vancouver, WA	22	663

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Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
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Pen maintenance system and method for operating same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

10631332

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PATENT NO	7104636
APP PUB NO	20040041872A1
SERIAL NO	10631332
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
September 12, 2006	US,7104636,B2 US7104636B2	GRANTED PATENT AS SECOND PUBLICATION
March 04, 2004	US,20040041872,A1 US20040041872A1	FIRST PUBLISHED PATENT APPLICATION

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10631332

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Family

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