Oscillating Sprinkler with Nozzles Waters up to 3000 Square-Feet Melnor was founded in the USA in 1946, two years later the first innovative Melnor oscillating sprinkler was introduced. While there have certainly been changes through the years, there has never been a change to our commient to offer new and innovative ways for the home gardener to maintain lush yards and bountiful gardens. For more than sixty-years, Melnor has been a trusted partner to retailers and homeowners.