You can also check the Library of Congress Copyright Office website at copyright.gov, and the show's copyrights were re-registered by CBS from 1979 to 1981.
The same is true for Beulah, although Alpha Video has recently released four episodes of this series. This show is much like Hazel, and there is nothing whatsoever offensive about it. You could say there are a few stereotypes in Amos 'n' Andy, but that doesn't mean it isn't one of the greatest television comedies ever made.
For anyone who hasn't discovered this during the almost one year in which this thread began, here is information on the dealer who is now using the company name of THE NOSTALGIA MERCHANT. The quotation below comes from their Ebay store. I think their prices for alleged public domain material are too high and some of the titles they offer as p.d. are suspect. Plus it appears from the description below that they do not know the differences between the words SELL and SALE. Also they appear to use an on screen "bug" logo to dissuade bootlegging. Ironic, no?
If you are checking out this page you are wondering about our name, "The Nostalgia Merchant." Yes we have the right to use this name. The Nostalgia Merchant name and logos are registered with the US Patent and Trademark Office (Reg. No. 3,171,311) Documentation can be provided upon request, or simply visit the UPTO web site at United States Patent and Trademark Office Home Page. We are aware that another company held this trademark for a number of years in the 1980s. But that company allowed the trademark to expire. After checking with the Trademark office we were informed that we could apply for that name which we did immediately. We began using that name and our trademark in public trade in 2005.
Our company specializes in the sell of old movies and TV shows on DVD. These movies are either in the Public Domain or we own the rights to the assets through improvements and enhancements or watermarking of that particular video asset. It is not our intention to violate anyone's intelluctual property rights or copyright law. If you can prove you own the rights to any of our products now on sell on eBay we will immediately remove that listing from our store or listings. PLEASE NOTE: ALL of our products for sell on eBay have been digitally watermarked for our protection. Specifically, we sell the Amos 'N' Andy Limited Edition Collection of 71 TV Shows, 2 cartoons and the movie, Check and Double Check and claim the rights to this particular edition through digital enhancements made to the video assets. We will vigorously pursue anyone attempting to sell copies of our product and anyone attempting to claim the exclusive rights to the Amos N' Andy TV Shows in an attempt to keep us from marketing this collection. The original shows are in the public domain. But we have worked long and hard to put together our collection and therefore reserve the right to produce and sell this product.