For the Inventor, By the Inventor

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Calhoun, LA, United States of America

Sewer Sentry LLC

USPTO Granted Patents = 3

Forward Citations = 0

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5 inventors (with patents filed for the assignee):

David Putnam (3 out of 31 patents)

Guido Quesada (1 out of 22 patents)

William Eugene Putnam (1 out of 1 patent)

4. Randall Avery Putnam (1 out of 1 patent)

5. Mark Alfred Weih (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 12345011 - Vented precipitation guarding manhole cover assembly (2025-07-01),

2. 12320089 - Reinforced manhole cover gasket (2025-06-03),

3. 12270175 - Vented precipitation guarding manhole cover assembly (2025-04-08),

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USPTO Data Jan 1 1976 - Jan 6 2026

3 Patents

#1 in Calhoun, LA

#307 in Louisiana

#72,067 in US

Calhoun, LA, United States of America

Sewer Sentry LLC

Forward Citations = 0

5 inventors:

David Putnam (3 out of 31 patents)

Guido Quesada (1 out of 22 patents)

William Eugene Putnam (1 out of 1 patent)

4. Randall Avery Putnam (1 out of 1 patent)

5. Mark Alfred Weih (1 out of 1 patent)

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