John Longan
49Patents
17h-index
46Co-inventors
81Inventor score
Filing activity: Aug 24, 1993 → Jan 21, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5558501A | Portable ceiling fan | Mechanical Engineering; Lighting; Heating | 180 | Expired |
| US5518370A | Portable electric fan with swivel mount | Mechanical Engineering; Lighting; Heating | 103 | Expired |
| US5547343A | Table fan with vise clamp | Mechanical Engineering; Lighting; Heating | 77 | Expired |
| USD395080S | Portable electric fan | General | 65 | Expired |
| US6321963A | Sheet material dispensing apparatus and method | Emerging Cross-Sectional Technologies | 55 | Expired |
| US6939397B2 | System for purifying and removing contaminants from gaseous fluids | Mechanical Engineering; Lighting; Heating | 52 | Expired |
| US6685074B2 | Sheet material dispensing apparatus and method | Emerging Cross-Sectional Technologies | 44 | Expired |
| US5514303A | Humidifier with removable suction tube | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US5611967A | Combination evaporative/warm mist humidifier | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| USD416321S | Portable electrical fan | General | 33 | Expired |
| US6412678B2 | Sheet material dispensing apparatus and method | Emerging Cross-Sectional Technologies | 33 | Expired |
| USD364676S | Cool mist impeller humidifier | General | 32 | Expired |
| US6164630A | Portable humidifier with water treatment substance dispenser | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5547615A | Portable humidifier with bacteriastat dispenser | Emerging Cross-Sectional Technologies | 28 | Expired |
| US6091888A | Portable environmental conditioning device with presence detector responsive shutoff | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US6149141A | Portable evaporative humidifier apparatus | Emerging Cross-Sectional Technologies | 23 | Expired |
| USD388162S | Humidifier | General | 19 | Expired |
| USD386579S | Front grill for a portable electric fan | General | 17 | Expired |
| USD389235S | Window fan | General | 14 | Expired |
| USD384140S | Humidifier | General | 14 | Expired |
| USD374071S | Portable electric fan with a swivel mount | General | 14 | Expired |
| USD377973S | Humidifier tank | General | 11 | Expired |
| USD395496S | Fan support rod | General | 10 | Expired |
| US5660586A | Variable discharge window fan | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| USD380043S | Compact portable window fan | General | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.