Bryant was the residential/light commercial loadcenter line of Westinghouse, the Bryant name was replaced w/ Westinghouse until Eaton bought the Westinghouse line from CBS. ( W. changed their name after they bought the CBS TV network & started to sell their industrial lines). Eaton merged the former Westinghouse divisions into their Cutler-Hammer subsiduary in the early 1990's.
This same situation occurs w/ I-T-E Circuit Breaker Co. , I-T-E Imperial Corp., Gould/I-T-E, I-T-E Electrical Products Div. of Siemens-Allis, Siemens/I-T-E, & Siemens + Siemens era Murray breakers are based on the I-T-E EQ frame breaker design introduced by Gould in 1979-80, but I doubt there is any paperwork allowing Murray & Siemens breakers to interchange, this is the problem that rears it's ugly head as the result of mergers & acquisitions over time.
Hubbell bought the Bryant wiring device line & perhaps that is why Bryant was removed as the brand of the loadcenter line???