Ronald J. Hoffman
67Patents
14h-index
39Co-inventors
84Inventor score
Filing activity: Jul 1, 1974 → Feb 27, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5841361A | Keyless locking system | Emerging Cross-Sectional Technologies | 84 | Expired |
| US7861679B2 | Cylinder and piston assemblies for opposed piston engines | Mechanical Engineering; Lighting; Heating | 76 | Active |
| US5087883A | Differential conductivity meter for fluids and products containing such meters | Physics | 76 | Expired |
| US5421292A | Cylinder head assembly | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US4894302A | Alkaline earth metal anode-containing cell having electrolyte of organometallic alkaline earth metal salt and organic solvent | Emerging Cross-Sectional Technologies | 36 | Expired |
| US7360511B2 | Opposed piston engine | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| USD278024S | Tab top can opener | General | 26 | Expired |
| US3958231A | Sequential time-base lock system | Physics | 24 | Expired |
| US5363723A | Angle gear drive | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5564374A | Cam carrier for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US5072095A | Vessel warmer utilizing timer reset means responsive to removal of vessel | Electricity | 16 | Expired |
| USD290197S | Desk | General | 15 | Expired |
| US5293847A | Powdered metal camshaft assembly | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4731309A | High rate and high energy density cell | Electricity | 14 | Expired |
| US6843296B2 | Master processing apparatus | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5021368A | Novel ceramic-metal compounds | Chemistry; Metallurgy | 12 | Expired |
| US5384838A | System for communicating through partitions | Electricity | 11 | Expired |
| US4901883A | File box with front door | Performing Operations; Transporting | 11 | Expired |
| US9606522B2 | Device for controlling a coffee maker | Human Necessities | 10 | Active |
| US7591235B2 | Opposed piston engine with piston compliance | Mechanical Engineering; Lighting; Heating | 9 | Active |
| US5463809A | Method of making a powdered metal camshaft assembly | Emerging Cross-Sectional Technologies | 9 | Expired |
| USD313629S | Clipboard for a shopping cart push bar | General | 8 | Expired |
| US6698487B2 | Master processing apparatus | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4900854A | Process for the preparation of asymmetrical alkaline earth metal organoborates, organoaluminates, organoarsenates, and organophosphates | Chemistry; Metallurgy | 7 | Expired |
| US5103146A | Control for a remote, radio operated device | Human Necessities | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.