Patente aus den USA 1986
- Patent:US4563819 14.01.1986 Ching Tien-Fu , Chou Lung-Chiao : Ellipsograph capable of drawing dotted line
- Patent:US4564750 14.01.1986 Pal B. Olsen : Device for combination of data
- Patent:US4567662 04.02.1986 Wallner, Peter : Device for drawing ellipses
- Patent:US4570344 18.02.1986 Clegg, John E. : Ellipsograph
- Patent:US4571191 18.02.1986 Graube, Peteris E. (1145 Collindale Ave., NW., Grand : Funnel teaching method and apparatus
- Patent:US4571837 25.02.1986 Cheng, Tien-Fu : Ellipsograph
- Patent:US38374 05.03.1986 Calvin D. Crane : Tax Calculator
- Patent:US4585927 29.04.1986 Thompson, Harold L. (10478 Goodwood Blvd., Baton Rouge, LA : Apparatus for predicting the exact time of currents in terms of the year, month, day and hour
- Patent:USD284088 03.06.1986 E. Pinter, M. Oellerich and G. W. Sybrecht : Nomograph
- Patent:US66269 07.07.1986 U. Turner : Counting-machine
- Patent:US4599508 08.07.1986 Smetaniuk, Terrace S. : Calorie counter
- Patent:US73995 02.08.1986 Albert C. Pierson : Calculating-machine
- Patent:US4611113 09.09.1986 Halstead, David K. : Heat stress calculator
- Patent:US4616419 14.10.1986 Kubo, Akio (655, Yamanouchi Kamakura shi Kanagawaken, JP) : Measuring device for a figure
- Patent:US4617740 21.10.1986 Mikio, Kobayashi (3-14-20 Sakura, Satagaya, Tokyo, JP) : Measuring device for a figure
- Patent:US4624057 25.11.1986 Hursey, William A. (502 West Canal St., Picayune, MS 39466) : Method and template for circle layouts
- Patent:US4625099 25.11.1986 John Freedom : Fertility calculator
- Patent:US4629429 16.12.1986 Horie, Tsuyoshi (7-15, Iwamoto-cho 3-chome,, Chiyoda-ku, : Abacus with each counter held in position by friction or magnetic attraction
- Patent:US4632661 30.12.1986 Mortensen, Vernon J. (Coeur dAlene, ID) : Methods for structurally performing differential calculus
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