APT vs REFR Comparison

Alpha Pro Tech Ltd is involved in the business of developing, manufacturing, and marketing of disposable protective apparel, building supply, and infection control products principally in the United States. It operates its business through segment which includes Building Supply and Disposable Protective Apparel. It mainly offers a line of construction supply weatherization products, namely house wrap and synthetic roof underlayment as well as other woven material, different styles of disposable products like shoe covers, bouffant caps, gowns, coveralls, lab coats, frocks and other miscellaneous products. It also provides face masks and eye shields. It generates most of its revenues from the sale of products across the United States.

Research Frontiers Inc is engaged in the development and marketing of technology and devices to control the flow of light. The company develops and licenses its patented suspended particle device light-control technology to other companies that manufacture and market the SPD-Smart chemical emulsion, the light-control film made from the chemical emulsion, the light-control panels made by laminating the film, electronics to power end-products incorporating the film, or lamination services for, and the end-products. Its revenue source comes from the licensing of technology.