Drennen Engineering, Inc. Trademarks
THE COVENTILATION METHOD
Filed: August 10, 2020
Technological planning and consulting services in the field of indoor air supply, distribution and exhaust
Owned by: Drennen Engineering, Inc.
Serial Number: 90104503
COVENTILATION
Filed: August 10, 2020
Maintenance of air flow via measurement, modeling, and redistribution to improve indoor air quality
Owned by: Drennen Engineering, Inc.
Serial Number: 90104571
