David W. Hubbard
42Patents
16h-index
55Co-inventors
84Inventor score
Filing activity: Dec 14, 1973 → May 10, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7617136B1 | System and method for capturing, storing and analyzing revenue management information for the travel and transportation industries | Physics | 236 | Expired |
| US4680595A | Impulse ink jet print head and method of making same | Performing Operations; Transporting | 163 | Expired |
| US4907013A | Circuitry for detecting malfunction of ink jet printhead | Performing Operations; Transporting | 95 | Expired |
| US4703333A | Impulse ink jet print head with inclined and stacked arrays | Performing Operations; Transporting | 49 | Expired |
| US4605939A | Ink jet array | Performing Operations; Transporting | 31 | Expired |
| US4506344A | Hand held electronic postage meter having secure postage meter doors | Physics | 30 | Expired |
| US4778018A | Apparatus and method of determining the mass of an article by measuring the shift in the period of harmonic motion | Physics | 23 | Expired |
| US5842800A | Multi function sensing device for printing apparatus | Performing Operations; Transporting | 23 | Expired |
| US4246643A | Low cost postage applicator | Physics | 23 | Expired |
| US5457636A | Postal finishing kiosk | Physics | 21 | Expired |
| US5675959A | Opening fingers for envelope inserting apparatus | Performing Operations; Transporting | 19 | Expired |
| US5196083A | System and method for producing items in selected configurations | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4848492A | Transporting and drive mechanism for a weighing scale | Physics | 18 | Expired |
| US5586817A | Drawer interlock apparatus | Fixed Constructions | 18 | Expired |
| US7461609B1 | Apparatus for control of pivoting wing-type sail | Performing Operations; Transporting | 17 | Active |
| US4635079A | Single element transducer for an ink jet device | Performing Operations; Transporting | 17 | Expired |
| US4271786A | Electrophotocopier developer unit mounting system | Physics | 14 | Expired |
| US5709525A | Envelope stacker | Performing Operations; Transporting | 13 | Expired |
| US4171744A | Document classifier | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7712427B2 | Apparatus for control of pivoting wing-type sail | Performing Operations; Transporting | 10 | Active |
| US5014797A | Modular mailing machine | Physics | 10 | Expired |
| US8069801B2 | Apparatus for control of pivoting wing-type sail | Performing Operations; Transporting | 10 | Active |
| US5354407A | Envelope flap moistening apparatus | Performing Operations; Transporting | 7 | Expired |
| US4173293A | Composite label web and method of using same | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4027586A | Method for printing a manually scannable bar code and articles carrying a vertically extended bar code | Physics | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.