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Brevetti  Stati Uniti  1984

 
  • Patent:US4425499 10.01.1984 Newton, Roger A. (Brookfield, WI) : Decision tree graphical computer
  • Patent:US4431214 14.02.1984 Veronica A. Buffington Federal Paper Board Co., Inc. : Data guide device
  • Patent:US4447954 15.05.1984 Poll Marian : Ellipsograph
  • Patent:US4448579 15.05.1984 Currie, Richard A. (833 S. Burgess Dr., Baton Rouge, LA : Arithmetic instruction apparatus
  • Patent:US4450615 29.05.1984 Pickios, Anthony G. : Method of fabricating a hand calculator
  • Patent:US4454409 12.06.1984 Sehres, Lynn (2730 W. Van Buren, Phoenix, AZ 85009) : Bra-size calculator
  • Patent:US4454410 12.06.1984 Merl, Milton J. (New City, NY) : Multi-variable analog computer
  • Patent:US4456821 26.06.1984 Harter, Burleigh W. (823 Canyon Rd., Redwood City, CA : Time/speed/distance slide rule
  • Patent:US4466799 21.08.1984 Argiro, Jason (Rd. 1, Box 367, Highland, NY 12528) : Cuboid block, instructional device for multiplication tables
  • Patent:US4476380 09.10.1984 Lorne G. Sampson : Calculator
  • Patent:US4479169 23.10.1984 Ralph Holmes : Calculator and apparatus for macrophotography

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