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Leadholder or Related Patent Thumbnail Index |
 http://leadholder.com/pat-us-d324069-1990-tombow.html |
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date of application date granted inventor assignee patent holder country |
1990 April 9 (1989 October 19, Japan) 1992 February 18 Kazunori Katami Tombow Pencil Co. Ltd. Japan |
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| patent employed on |
 Tombow 2.0 leadholder |
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