Inventor
BROWN MARVIN A
US8 patents
⚠️ This page may combine multiple inventors who share the name “BROWN MARVIN A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
LEOPOLD CO INC F B
7 patentsUS5489388AFeb 6, 1996
Apparatus and method for improving gas backwash in lateral underdrains
LEOPOLD CO INC F B48 citations94
US5269920ADec 14, 1993
Cap system for underdrains in gravity filters
LEOPOLD CO INC F B60 citations94
US5160614ANov 3, 1992
Air duct block for air/water underdrain systems in gravity filters
LEOPOLD CO INC F B62 citations94
US5149427ASep 22, 1992
Cap for underdrains in gravity filters
LEOPOLD CO INC F B62 citations93
US5328608AJul 12, 1994
Mutli-lateral filter underdrain block
LEOPOLD CO INC F B46 citations91
US5087362AFeb 11, 1992
Flume distribution system with removable block
LEOPOLD CO INC F B50 citations91
US5232592AAug 3, 1993
Cap for underdrains in gravity filters
LEOPOLD CO INC F B46 citations90