Patents/Inventors

David Alan Putnam

West Monroe, LAUS2 patents

3 Patents

US123450112025
Vented Precipitation Guarding Manhole Cover Assembly
SEWER SENTRY LLC
0 cites
US123200892025
Reinforced Manhole Cover Gasket
Sewer Sentry LLC
0 cites
US122701752025
Vented Precipitation Guarding Manhole Cover Assembly
SEWER SENTRY LLC
0 cites