Donald J. Boersma

📍 Country Club Hills, IL: #7 of 53 inventorsTop 15%

🗺 Illinois: #21,447 of 84,256 inventorsTop 30%

Overall (All Time): #1,305,514 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
10487492	Enhanced drain cover	—	2019-11-26
4655913	Adjustable drain cover	—	1987-04-07
4257892	Drain cover	—	1981-03-24
D256948	Drain cover	—	1980-09-16