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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.

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Class 52/220.4 - Corrugated type


Subclass of Class 52 - Static structures (e.g., buildings)
Definition: Unit in which the paths are defined by alternating parallel
No. of applications: 1
Last issue date: 06/18/2009


Application No.Application TitleIssue Date
20090151278FLOORING SYSTEM AND METHOD FOR INSTALLING INVOLVING A CORRUGATED MEMBER AND A PANEL FLOORING MEMBER
A first description of a flooring system includes; a corrugated member containing metal and having ribs and valleys; a panel flooring member positioned over the ribs; and a fastener attaching the flooring member to one of the ribs. Each rib has a maximum transverse widt... 		06/18/2009
 
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