The lawsuit was filed Wednesday in LA County Superior Court by Bob Banner's production company ... and according to the docs Bob had a partnership to co-produce the show with Carol from 1967 to 1972.
Bob died in 2011 from Parkinson's disease ... but according to the lawsuit Burnett and Time Life struck a home video distribution deal in the summer of 2012. The suit alleges Bob -- or rather, his company -- was cut out of the profits from that deal.
Banner's company is demanding a full accounting of all profits earned from the 'Carol Burnett Show' -- including the home video deal ... and, of course, wants its cut.
We reached out to Carol's people, but haven't heard back.