You beat me to it lolThe book American Gunmaker describes how many patents Winchester bought from JMB. It was something like for every thirty patents he designed, one gun went into production. Winchester didn't burn his patents, they just sat on the intellectual property rights. Winchester only paid lump sum for the patent rights, which annoyed JMB when it came to the Auto-5. JMB wanted royalties to ensure Winchester produced the gun. Winchester refused, so JMB went to Remington. While JMB was in Remington's offices, the President of Remington dropped dead. So JMB went to FN and the rest is history.
JMB liked to take the train from Ogden to New Haven with all his prototypes once a year to showcase his new designs. If he had to send something ASAP, he would mail a prototype to Winchester.