Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
Home › Inventors › David J. Schaeffer
DS

David J. Schaeffer

Chatham, IL: #20 of 37 inventorsTop 55%
Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #4,096,299 of 4,157,543Top 100%
1 Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4288206 Automatic multiple water sampler David C. Tigwell 1981-09-08

Nearby-Ranked Inventors

Jorg Lutzkendorf1
Konrad Sieber1
Toshio Fujieda1
James O. Sutton, II1
Albin Viertler1
Jane A. Kling1
Gonzalo P. Gomez1
Volkmar Tennemann1
Norbert R. Tarradellas1