So Dad got the idea for a fantastic business related to patent filings and infringements, kind of an amalgam between legal and IT but not a legal practice, strictly speaking. As I am able to remember it, he had become friendly with Ed Greer, who was head patent counsel for the Union Carbide Corporation. Union Carbide was one of the biggest chemical corporations of the day and was headquartered in their own magnificent skyscraper two blocks up Park Avenue from the Pan Am Building.
It was a probably a simple matter for Dad to put it together that large corporate patent owners could benefit from some form of computer calendaring.
Keep in mind that a large company like Union Carbide owned a large portfolio of patents. They would initially file patent applications in the home country, USA for Union Carbide. And as they were a large multinational corporation selling their wares everywhere, once the patent applications were accepted here at home, they would then engage in an international filing program elsewhere, typically the largest 15 countries in Western Europe and then Canada, Japan, Australia, New Zealand, and maybe Brazil and South Africa to boot.