Patente aus den USA 1980

Patent:USD253830 01.01.1980 R. Wallace Wright : Slide chart
Patent:US4182043 08.01.1980 Nemoto, Yoshio : Drawing instrument for an ellipse
Patent:US4184261 22.01.1980 Wolfgang P. Buerner Los Angeles Scientific Instrument Co., Inc. : Multipurpose drafting and measuring instrument
Patent:USD254078 29.01.1980 Exel, Gerrit A. van : Slide Frame for Calculator or the like
Patent:US4187629 12.02.1980 Yamada, Yoshikazu Yamada-Graphics Corp. : Perpetual and multi-year calendars
Patent:US4189634 19.02.1980 Labove Larry, Mitchell Robert IBM : Slide Rule for hyperalimentation dosage computations
Patent:US4194111 18.03.1980 Katz, Joseph : Tidal depth calculator
Patent:US4194292 25.03.1980 Wojcik, Tadeusz P. : Drawing instrument
Patent:US4205907 03.06.1980 Peter T. Quinn Stephen Blecher Rollei of America, Inc. : Calculator for electronic flash
Patent:US4210093 01.07.1980 Baker, Richard A. (788 Woods La., Grosse Pointe Woods, MI : Counting device
Patent:USD255784 08.07.1980 Seely, Douglas D. : Multiple Scale Rule
Patent:US4217696 19.08.1980 Schindler, John R. (P.O. Box 5171, Klamath Falls, OR 97601) : Time-distance calculator
Patent:US4218609 19.08.1980 Chin, Yi (23356 Batey Ave., Harbor City, CA 90710) Chen, Yi : Educational mechanical calculator
Patent:US4226022 07.10.1980 Chen Jen-Sheng, Chen Jen-Hung : Ellipsograph
Patent:US4228604 21.10.1980 Gabriel B. Cherian : Biorhythmic device
Patent:US4230936 28.10.1980 Oerth Daniel P Oerth Daniel P : Biorhythmic Slide Rule
Patent:US4233757 18.11.1980 Narcise, Jacqualine (1300 Delaware St., Berkeley, CA 94702) : Mathematics device
Patent:US4233768 18.11.1980 Bromberg, Howard M. (P.O. Box 316 Kingsbridge Station, New : Slide calculator
Patent:US4241867 30.12.1980 Dugas Madeleine, Wolf Robert Graphic Calculator : Slide Rule

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