David Engel
18Patents
6h-index
20Co-inventors
66Inventor score
Filing activity: May 13, 1977 → Jun 27, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7705882B2 | Device and system for enabling families to share in long haul truckers' travels | Electricity | 31 | Active |
| US10472901B2 | Electrical wellbore instrument swivel connector | Electricity | 21 | Active |
| US6935771B2 | Mixer seal and bearing apparatus and method | Performing Operations; Transporting | 10 | Expired |
| US5842377A | Mixer gearbox assembly having a cross-shaft alternatively mounted in one or two bearings and configured to receive different drive motors | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4141668A | Method and apparatus for erecting a bridge structure | Fixed Constructions | 8 | Expired |
| US5720486A | Self-formed labyrinth seal | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5560709A | Mixer drive apparatus enabling radial changing of shaft seal | Performing Operations; Transporting | 4 | Expired |
| US5746536A | Double taper lock system for a locking a mixer shaft in a quill | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6877750B2 | Drive assembly for a mixer | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6715913B2 | Shaft bearing support method and apparatus | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US9610894B2 | Intrusion detection system and methods thereof | Performing Operations; Transporting | 2 | Active |
| US10518700B1 | Instrusion detection system and methods thereof | Performing Operations; Transporting | 2 | Active |
| US6843612B2 | Retaining ring apparatus and method | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7407322B2 | Tripod-mounted magnetic mixer apparatus and method | Performing Operations; Transporting | 1 | Expired |
| US6457853B1 | Impeller device and method | Performing Operations; Transporting | 0 | Expired |
| US12084934B2 | Slot cutter system and operations | Fixed Constructions | 0 | Active |
| USD323663S | Transmission cover | General | 0 | Expired |
| US12098608B2 | Cutting tool and controls for downhole mechanical services | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.