The late Jerome H Lemelson is well known to numerous manufacturers, not only in the United States but all around the world. During his lifetime, Lemelson, who was the extremely litigious inventor-owner of a large number of patents granted by the United States and many other countries, was also famous for his pursuit of what are known in the United States as submarine patents. The term submarine, which is not unique to Lemelson patents, is based upon the fact that US patents so termed have matured from divisional or continuation applications of parent, grandparent, or even more remote ancestor patent applications filed, in some cases, 20 to 30 years before issuance of the submarine descendant patent.