Company Logo in Credits

The symbol at the bottom of this image is the logo for the National Association of Broadcast Employees and Technicians (NABET), a company represented by the code co0292090 on IMDb. The image is from the very last part of the end credits of the documentary The Wobblies (1979). My question is, does this logo qualify as a "company credit" which should be added to the IMDb page, and if so, which category? And what, if anything, should be entered in the type/role/attribute query?

Note: This particular company isn't credited anywhere else in the film (neither in the opening titles nor elsewhere in the end credits). The primary production company credited at the beginning is something called "The Center for Educational Productions", which doesn't seem to have any other film credits to its name.