Invention Grant
- Patent Title: Marker for optical mark response forms
- Patent Title (中): 光学标记响应表格的标记
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Application No.: US11771940Application Date: 2007-06-29
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Publication No.: US08690464B2Publication Date: 2014-04-08
- Inventor: Amara Rahman Durham
- Applicant: Amara Rahman Durham
- Agency: Slater & Matsil, L.L.P.
- Main IPC: B43K27/08
- IPC: B43K27/08

Abstract:
A writing instrument is disclosed that can enhance the speed and accuracy for a respondent using an optical machine response form. This writing instrument includes at least two reservoirs for dispensing two independent fluids with different optical reflectivity, whereby an application of the second fluid on top of a layer marked with the first fluid of the response form, modifies the digital response from the optical machine.
Public/Granted literature
- US20090003919A1 Marker for Optical Mark Response Forms Public/Granted day:2009-01-01
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