Patents by Inventor Dwight E. Shoemaker

Dwight E. Shoemaker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Drafting instrument
    Patent number: 4439928
    Abstract: A drafting instrument is disclosed providing for a large number of independently viewable scales in a single self-contained instrument. A flexible graphics sheet having a large number of scales thereon is attached to two rotatable shafts mounted within a housing. The housing has a viewing slot which allows the display of individual scales on the graphics sheet.
    Type: Grant
    Filed: February 8, 1982
    Date of Patent: April 3, 1984
    Inventor: Dwight E. Shoemaker, Jr.
  • Combination drafting instrument including rotatable scales, compass assembly and straight edge magnifier
    Patent number: 4314408
    Abstract: A combination drafting instrument including a beam compass, a magnifying glass, a protractor, a proportional divider, an architectural scale, an engineering scale and other scales in a single self-contained package in order to perform most ordinary drafting procedures.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: February 9, 1982
    Inventor: Dwight E. Shoemaker