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US Patent 5331472 - Method and apparatus for measuring hair density
US Patent Issued on July 19, 1994
Estimated Patent Expiration Date:
September 14, 2012Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
September 14, 2012Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA method and apparatus for measuring hair in a predefined area of skin. The method addresses the preparation of the skin and the device for counting the hairs in a defined area. The apparatus contains an optical magnifying lens, a housing for the lens and an aperture of known surface area in order to calculate the density of the hair in the portion of skin under measurement. When the method or apparatus are used, the end result will be a density measurement of hair per unit area. When this measurement is compared with similar measurements in the same area from a previous time or from a different area at the same time, a diagnosis of whether hair loss is occurring can be made with considerable accuracy. Similar applications can be made in areas where treatment suggests that hair loss has ceased or reversed through some intervention. | InventorApplicationNo. 944405 filed on 09/14/1992US Classes:359/894, OPTICAL APERTURE OR TUBE, OR TRANSPARENT CLOSURE359/802, Magnifier359/808, With lens casing359/809Combined with diverse art tool, instrument or machineField of Search359/798, With viewed object or viewed field illumination359/800, Illumination through lens359/801, With viewed object support359/802, Magnifier359/803, Hand held359/804, With viewed object support359/805, On lens supporting handle359/806, Relatively movable informatory sheet and lens (e.g., reading machine, etc.)359/808, With lens casing359/809, Combined with diverse art tool, instrument or machine359/810, Operation viewed through lens359/811, With support359/894OPTICAL APERTURE OR TUBE, OR TRANSPARENT CLOSUREExaminersPrimary: Ben, LohaAssistant: Robbins, Thomas Attorney, Agent or FirmUS Patent References1396607, 2110310, 3981593, Soft contact lens inspection deviceIssued on: 09/21/1976 Inventor: Boyle5087112, Optical magnifier apparatus Issued on: 02/11/1992 Inventor: Feinbloom5196964, Magnifier Issued on: 03/23/1993 Inventor: Heine, et al.5210647Fiber viewer Issued on: 05/11/1993 Inventor: Hartnagel, et al. International ClassG02B 027/00 |
