David W. Smith
41Patents
17h-index
37Co-inventors
81Inventor score
Filing activity: Dec 18, 1974 → Mar 20, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6755344B1 | Systems and methods for determining an authorization threshold | Physics | 265 | Expired |
| US6547132B1 | Point of sale payment terminal | Physics | 185 | Expired |
| US7299979B2 | Systems and methods for interfacing location-base devices | Physics | 156 | Expired |
| US7520420B2 | Systems and methods for generating receipts | Physics | 141 | Expired |
| US7455220B2 | Systems and methods for managing throughput of point of sale devices | Physics | 137 | Active |
| US7064269B2 | Quick connect electrical junction box assembly | Mechanical Engineering; Lighting; Heating | 84 | Expired |
| US5769263A | Compartmentalized top cover promotional closure | Performing Operations; Transporting | 68 | Expired |
| US4575150A | Suspension arrangement for a tilting chair | Human Necessities | 67 | Expired |
| US4765531A | Quick change work station apparatus for automatic wire bonders | Electricity | 64 | Expired |
| US4101100A | Aircraft flight line servicing system | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6935559B2 | Systems and methods for determining an authorization threshold | Physics | 29 | Expired |
| US7118030B2 | Systems and methods for interfacing location-base devices | Physics | 28 | Expired |
| US4850444A | Hood louver drain pan and screen | Performing Operations; Transporting | 27 | Expired |
| US7413117B2 | Pre-paid activation and replenishment on a point-of-sale device | Physics | 23 | Expired |
| US6546878B1 | Multi-unit railroad freight car for carrying cargo containers | Performing Operations; Transporting | 22 | Expired |
| US7191941B1 | Systems and methods for determining a need for authorization | Physics | 21 | Expired |
| US7540410B2 | Point of sale payment terminal | Physics | 19 | Active |
| US5074514A | Christmas tree holder | Human Necessities | 16 | Expired |
| US7769638B1 | Systems and methods for verifying authorization for electronic commerce | Physics | 14 | Active |
| US5508487A | High voltage circuit interrupting device operating mechanism including trip latch assembly | Emerging Cross-Sectional Technologies | 13 | Expired |
| US3958814A | Three wheeled vehicle | Performing Operations; Transporting | 12 | Expired |
| US4246437A | Sealing apertures through which electrical terminals protrude | Electricity | 12 | Expired |
| US4431175A | Floating belt friction feeder | Performing Operations; Transporting | 11 | Expired |
| US5372505A | Vehicle simulator | Human Necessities | 11 | Expired |
| US6510800B1 | Multi-unit railroad freight car for carrying cargo containers between container well units | Performing Operations; Transporting | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.