Bill Gates turned 15 years old in 1970, so if he was shipping anything in the 60's, it was probably on the cheap, especially considering he founded Microsoft largely on a lie and stolen ideas.
Several companies helped him out in getting started, not one of which has been the recipient of any loyalty from Gates.
He founded Microsoft as a subsidiary of MITS, and refused to give MITS any Microsoft revenue that wasn't directly related to the sales of Altair BASIC, and when Microsoft outgrew their Albuquerque office, they slashed ties with MITS and moved to Seattle.
IBM gave Gates a huge break and when things got rolling, Gates pulled the rug out from under IBM, refusing to transfer the copyright for MS-DOS to IBM, thus cheating IBM out of all software sales for their own computers. He did give them a trimmed down version of MS-DOS, tho, called PC-DOS, but charged IBM royalties on that, too.
Microsoft and IBM partnered up again to create OS/2 for IBM machines with Windows sitting on top of it, and when it came time to develop it further as Windows 3.0, Microsoft undercut IBM by bundling MS-DOS instead of OS/2 with Windows, leaving the standalone OS/2 package and IBM out in the cold.
Bill Gates might not be the best example to use here.