US Patent 7237970 Marker pens
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Patent abstract
A marker pen comprises a tubular housing from one end of which protrudes a first fluid retaining nib replenished by fluid such as an indicator ink present in a first chamber positioned within the housing, and a second fluid retaining nib which also protrudes from the aforesaid end of the housing and is replenished by fluid such as an eradicator fluid present in a second chamber positioned within the housing. The protruding nibs are spaced one from the other.
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US Patent 07237970 Marker pens US Patent 7237970 Marker pens
Infobox
Patent Number
0723797000
Patent Number
723797000
Edits on 29 Mar, 2023
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
072379700
Date of Patent
July 3, 2007
0Patent Application Number
104674160
Date Filed
February 6, 2002
0Official Website
Patent Primary Examiner
Edits on 26 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
072379700
Date of Patent
July 3, 2007
0Patent Application Number
104674160
Date Filed
February 6, 2002
0Official Website
Patent Primary Examiner
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US Patent 07237970 Marker pens
Infobox
Is a
Patent jurisdiction
Patent number
07237970
Date of patent
July 3, 2007
Patent application number
10467416
Date Filed
February 6, 2002
Patent primary examiner
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