191786 ⎘
Hand manipulated computing devices; Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by construction with circular or helical scales
Sub-classes:Slide rule style flight computer
#2Star navigation tool and system
#3Star navigation tool and system
#4Analog calculator for wind deflection of rifle bullets
#5Trigonometer
#6Rifle sight analog template
#7Ametropia progression indicating device
#8Air Navigation Computer
#9Hyperbilirubinemia management calendar
#10Data storage device and method for determining the dependency of the risk for prostate cancer, device and method for indicating a risk for a disease of an individual
#11Comprehensive time determining system
#12Device for resolving interpersonal relationship issues
#13Promotional apparatus for calculating characteristics of subjects using two input variables