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US 6,712,264 B2Granted
Wheel calculator
OwnerRonald Bromberginventor
Life of this patent
Estimating the term…
Abstract
A wheel chart having at least one rigid disk formed by a compact disk which, in addition to having a mirrored or reflective layer capable of carrying reproducible information, has legible matter on an obverse side which cooperates with a member such as a transparent rigid disk which can also bear indicia to enable calculations to be made by relative rotation of a disk and a member juxtaposed therewith.
Claims15
A wheel chart comprising:
- a support having a surface;
- and
- a rigid plastic disk having a hub portion with a central hole and of a compact-disk type at least partially metallized on a face of said disk and rotatable relative to said support, said support and said disk having respective indicia which can be correlated by rotation of the disk relative to said support.
Dependencies are inferred from the claim text.