David W. Kratz

📍 Chesterfield, MO: #2,561 of 6,461 inventorsTop 40%

🗺 Missouri: #8,863 of 23,789 inventorsTop 40%

Overall (All Time): #2,369,459 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4250911	Chemical feeder with disposable chemical container	—	1981-02-17
4199001	Chemical feeder	—	1980-04-22