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...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.

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Class 157/1.45 - Screw and nut actuated


Subclass of Class 157 - Wheelwright machines
Definition: Devices wherein the mechanism for moving the rim engaging
No. of patents: 1
Last issue date: 01/04/2011


NumberTitleIssue Date
7861760Portable tire demounting tool
A method and apparatus for demounting tires from wheel assemblies with a hook assembly and a prying foot. One tool has two holding hooks that grasp the tool to the wheel and a foot that is attached to the holding hooks, and a bearing pivot point that allows the demo...
01/04/2011
 
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