• Patent Title: Device and system for measuring length
  • Application No.: US16939910
    Application Date: 2020-07-27
  • Publication No.: US11320249B2
    Publication Date: 2022-05-03
  • Inventor: Joseph Hall
  • Applicant: Joseph Hall
  • Applicant Address: US NC Durham
  • Assignee: Joseph Hall
  • Current Assignee: Joseph Hall
  • Current Assignee Address: US NC Durham
  • Agent Kathleen M. Lynch
  • Main IPC: G01B3/00
  • IPC: G01B3/00 G01B3/04
Device and system for measuring length
Abstract:
A measuring ruler, tape or other instrument having a straight edge located along at least one length of the ruler. The ruler has a first surface having a background color, and a second opposed surface. The ruler also has a set of spaced apart indicia located on the first surface along the at least one length. The indicia are oriented perpendicular to the straight edge. The width of the first indicium and last indicium of a whole number unit measurement length appear half as wide as the width of all remaining fractional indicia.
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