I have lived here for most of my long years and never heard of any bike named "Richmond" or a custom builder named "Richmond" (and either connected with the City of or the SF District of) but agree that if there IS one Ed Litton might be best positioned to know...Ed's shop is in POINT Richmond, a distinct separated region of the city of Richmond CA and on the Bay, home of the Rosie the Riveter/World War II Home Front National Historical Park.
(my civic boosterism now done for the year!)
If somebody comes up with an example of an eponymous "Richmond" frame from the Bay Area I'll be surprised, but crazier things have happened around here!