The Kamprite Trailer was manufactured in St. Louis, Missouri during the 1920's by the Lippman Kamprite Trailer Company. William A. Lippman applied for a patent for his camping trailer on May 2, 1921 and was granted US Patent 1,564,257 on December 8, 1925. The Lippman Kamprite Trailer Company start manufacturing the trailer sometime in 1921.
At the time of this writing I have no further information. Please contact me if you have any information, advertisements, or brochures.