PORTA-KAMP by P-K INTERESTS, INC. (Track this)
Intl: (019) Nonmetallic building materials US: 012 Filing date: 18-Jun-1964 Serial number: 72195965
PORTA SCREEN by Gilson Company, Inc. (Track this)
Intl: (009) Electrical and scientific apparatus US: 026 Filing date: 11-May-1960 Serial number: 72096853