Panasonic Corporation used the National brand outside of North America from the 1950s to the 1970s (the trademark could not be used in the United States because it was already in use by the National Radio Company in a closely related product area). It sold televisions, VHS VCRs, high fidelity stereo receivers, multi-band shortwave radios and marine radio direction finders, often exported to North America under various U.S. brand names, such as Technics, Emerson, Curtis Mathes and of course Panasonic.