The colors blue, black and gray are claimed as a feature of the mark.
The color blue appears in the letter "A" and in the word "STAK". The color black appears in the stylized letter "V" and underline, in the wording "MULTI-LEVEL AIRCRAFT HANGARS" and in the airplane design. The color gray appears in the wording "SYSTEMS, INC." and in the airplane design.
"SYSTEMS, INC." and "MULTI-LEVEL AIRCRAFT HANGARS"