The DM-60, introduced in 1971, is a light-weight, infrared EDM, with a short range (distances from 1 foot to 1 mile) and a digital readout. New, it cost $3,988. The patent (#3,728,025) for "Optical Distance Measuring Equipment" is dated April 17, 1973. The trademark for the name "Cubitape" is dated January 8, 1974. Cubic Industrial Corporation was in business, as such, from 1971 to 1975. The DM-60 was remarkably successful. This example was used in Alaska, perhaps in association with the Alaska pipeline. The United States Army Engineers used many instruments of this sort for construction work, as well as
for topographic and mapping surveys.
Ref: "Infrared Surveying Instrument is Automatic," Engineering News Record 186 (6 May 1971): 44.
Advertisement in Civil Engineering 41 (Sept. 1971): 26.
