|6244863||Dental color comparator scope|
A dental comparator scope for comparing a dental shade to a natural tooth. The scope comprises an L-shape body which includes a sight applying to the tooth and a handle for holding the scope, and a cartridge with a plurality of dental shades in it. Two id...
|4904605||Method and apparatus for residential water test kit|
The present invention relates, generally, to an apparatus and method for water testing and, more particularly, to a simple dipstick type method for use in comparison with a color chart and suggested courses of action to correct deficiencies in water quali...
|4797256||Registration device for blood test strips|
A ring-shaped registration device for receiving and holding an activated test strip having a reagent area adapted to receive a blood sample. The registration device is slidably received on the outer peripheral surface of a cylindrical vial on which markin...