VALMARK by Valmark Industries, Inc. (Track this)
Intl: (040) Treatment of materials US: 103; 106 Filing date: 17-Mar-1994 Serial number: 74501243
CALMARK by SCHROFF, INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 021 Filing date: 05-Sep-1972 Serial number: 72434583
SEALMARK by ROCK OF AGES CORPORATION (Track this)
Intl: (019) Nonmetallic building materials US: 050 Filing date: 25-Jan-1963 Serial number: 72161423