An important thing to remember is that JMB was always someone else s employee , First his Father, and brothers, then Winchester, Colt, and FN, (which was started long before JMB ).
He also NEVER worked in any other industry, Browning was strictly a "Gun maker".
If you want to talk about inventors Browning isn't even in the running.
Hiram Maxine had dozens of patents in gas lighting, compressed gasses, and a dozen other fields before he ever turned his hand to the one gun he designed. He also made huge breakthroughs in formulating black powder, and when his lungs started going bad he designed and built his own "iron lung".
Then there is Dr Gatling.
Invented a screw propeller for ships at 18.
Unfortunately he waited for spring before going to Washington to file his patent application, John Erickson didn't and beat him by 2 months .
After that Gatling did not wait when he came up with a "seed drill" and other farm implements .
Even Colt was more innovative, Browning built guns.
Colt designed a gun system, then he turned around and designed or modified the tools and machines to build them, tools and machines that are still being used 150 years later.