HMI Industries, Inc.
🏢 View company profile →23Patents
0Active
23Granted
35Portfolio score
Filing activity: Apr 8, 1994 → Jul 17, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5641343A | Room air cleaner | Performing Operations; Transporting | 80 | Expired |
| US5593479A | Filter system | Emerging Cross-Sectional Technologies | 76 | Expired |
| US5515573A | Vacuum cleaner canister base connector | Human Necessities | 62 | Expired |
| US5837020A | Room air cleaner | Mechanical Engineering; Lighting; Heating | 57 | Expired |
| US6090184A | Filter system | Emerging Cross-Sectional Technologies | 40 | Expired |
| US6616722B1 | Room air cleaner | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US5603741A | Vacuum cleaner and filter bag with air management | Performing Operations; Transporting | 39 | Expired |
| US6402822B1 | Furnace filter system | Performing Operations; Transporting | 39 | Expired |
| US6511531B1 | Room air filtering and freshening device | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6799351B2 | Floating nozzle | Human Necessities | 33 | Expired |
| US5572835A | Telescoping flagpole | Emerging Cross-Sectional Technologies | 32 | Expired |
| USD432746S | Canister vacuum cleaner | General | 28 | Expired |
| US6197096A | Filter system | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6491735B2 | Furnace filter system | Performing Operations; Transporting | 24 | Expired |
| US5651811A | Filter system | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6687952B1 | Wet vacuum cleaner attachment for vacuum cleaners | Human Necessities | 20 | Expired |
| US6547856B2 | Filter system | Emerging Cross-Sectional Technologies | 19 | Expired |
| USD455531S1 | Portable vacuum cleaner | General | 13 | Expired |
| US5522908A | Filter bag for a vacuum cleaner | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7018438B2 | Filtering system | Human Necessities | 11 | Expired |
| US6735810B2 | Vacuum cleaning system for recreational vehicles | Human Necessities | 10 | Expired |
| US6488744B2 | Filter system | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5658362A | Vacuum cleaner and filter bag with air management | Performing Operations; Transporting | 7 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.