Of course a couple of major items that you left out are that a large majority of the legacy early GPS/ Nav/Com radio companies got their start from Art Collins of Collins radio. There was King Radio and around the same time there was Wulfsberg radio both in Kansas and around the same time there was Global Navigation in Tucson who BTW got their big push by designing some products for King Radio and then when Global Nav merged with Wulfsberg radio in Prescott Arizona they bacame GWS, (Global Wulfsberg Systems). At Embrey Riddle university in Prescott Arizona there is a photo of Art Collins, Ed King and Paul Wulfsberg, the 3 of them working side by side at Collins radio designing early Nav and Com radios. The Paul Wulfsberg merger which started Global-Wulfsberg in the mid 1980’s in Prescott Arizona then became Global-Wulfsberg-Systems who actually had a working GPS for high end Business jets prior to Garmin and of course prior to GPS GWS also had their hand in loran C. And then you mention IIMorrow but you forget that before II Morrow they were Morrow who made SSB HF Marine radios for the Alaskan fishing fleet and they were the original local boys and girls here in Salem Or. who eventually became Garmin AT. After the Morrow marriage fell apart they became IIMorrow after a bad breakup that I won’t get into and of course then IIMorrow became UPS-AT. And eventually UPS-AT was saved from the hands of of the wicked Brown boys in panel trucks by the grace of Garmin. I had the fortune to work for every one of these companies starting with Wulfsberg radio in Prescott then becoming Global-Wulfsberg then Global-Wulfsberg-Sundstrand-Data control then Global-Wulfsberg-Allied-Signal then briefly GWS Allied-Signal-King radio then coming home to Arizona again with Chelton-Cobham/Wulfsberg radio then doing a full 360 and finding myself back to my Kansas roots back at Garmin AT. As you see the world of American avionics has its roots in almost every one of these early companies that you mention but one thing in common with every one of them is that most if not all of them got started by Art Collins.