As from 1950 N.V. Fridor Fabrieken are the continuation of the activities of N.V. Waldorp Radio, daughter company of N.V. Nederlandsche Instrumentenfabriek Waldorp in Den Haag. After the Second World War Waldorp Radio continued to produce radios with the brandname Waldorp, but at the end of the decade it also used the name Waldorp-Fridor and Fridor-Waldorp and also entered into the business of other products, like irons and vacuum cleaners. In 1950 the brandname Fridor was officially added to the list of brandnames and in the year thereafter the name of the company was changed into "N.V. Fridor Fabrieken". It is very likely that these moves were the result of changes in the ownership of the company. Radios produced as from the year 1951 only carried the brandname Fridor. Since 1937 Waldorp as well as Fridor radios were based on Philips chassis, but housed in own cabinets.

Unfortunately the business did not develop as desired and N.V. Fridor Fabrieken went bankrupt in the beginning of 1954. The last models originate from the year 1951/1952.