Robert Donaldson
22Patents
12h-index
21Co-inventors
81Inventor score
Filing activity: Jan 16, 1974 → Oct 3, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3956158A | Pourable liquid compositions | Chemistry; Metallurgy | 43 | Expired |
| US4682418A | Coordinate measuring machine | Physics | 30 | Expired |
| US6318189A | Digital torque-responsive pneumatic tool | Physics | 22 | Expired |
| US5572967A | Variable roller valve system for internal combustion engine | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5173613A | Coordinate measuring machine with improved table support | Physics | 21 | Expired |
| US4809015A | Continuous ink jet printer having modular print head assembly | Performing Operations; Transporting | 18 | Expired |
| US5655494A | Variable roller valve system for internal combustion engine | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4155871A | Detergent compositions | Chemistry; Metallurgy | 16 | Expired |
| US6734266B2 | Catalyst for olefin polymerization | Chemistry; Metallurgy | 14 | Expired |
| US5535647A | Friction clutch wrench | Performing Operations; Transporting | 13 | Expired |
| US5509332A | Friction clutch hand tool | Performing Operations; Transporting | 13 | Expired |
| US4389781A | Pneumatic counterbalance for a coordinate measuring machine | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6340771B1 | “Sweet” MAO | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5090650A | Mounting bracket arrangement for aligning optical system components | Physics | 8 | Expired |
| US4154694A | Detergent compositions | Chemistry; Metallurgy | 7 | Expired |
| US5298183A | Soap powder compositions | Chemistry; Metallurgy | 5 | Expired |
| USD433612S | Impact wrench | General | 5 | Expired |
| US6710143B2 | Supported phosphinimine polymerization catalyst | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6750170B2 | Sweet MAO | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6730755B2 | Halosulfonic acid treated catalyst support for olefin polymerization | Emerging Cross-Sectional Technologies | 1 | Expired |
| US10517606B1 | Inflatable arm sleeve | Human Necessities | 1 | Active |
| US8448128B2 | Post-merger integration systems | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.