Inventor
SCHAEFER HAROLD W
US8 patents
⚠️ This page may combine multiple inventors who share the name “SCHAEFER HAROLD W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NAT UNION ELECTRIC CORP
5 patentsUS4209873AJul 1, 1980
Brush-beater for a vacuum cleaner and method for making the same
NAT UNION ELECTRIC CORP36 citations90
US4249281AFeb 10, 1981
Self-propelled vacuum cleaner
NAT UNION ELECTRIC CORP52 citations88
US4311493AJan 19, 1982
Vacuum cleaner bag assembly
NAT UNION ELECTRIC CORP12 citations72
US4240812ADec 23, 1980
Vacuum cleaner bag assembly
NAT UNION ELECTRIC CORP11 citations72
US4312542AJan 26, 1982
Method of making a brush-beater for a vacuum cleaner
NAT UNION ELECTRIC CORP17 citations71