David E. Schafer
27Patents
10h-index
26Co-inventors
75Inventor score
Filing activity: Nov 4, 1974 → Mar 20, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5870482A | Miniature silicon condenser microphone | Electricity | 257 | Expired |
| US5740261A | Miniature silicon condenser microphone | Electricity | 145 | Expired |
| US7336797B2 | Apparatus and method for generating acoustic energy in a receiver assembly | Electricity | 25 | Expired |
| US7860264B2 | Acoustic assembly for a transducer | Emerging Cross-Sectional Technologies | 22 | Active |
| US7415125B2 | Apparatus and method for creating acoustic energy in a receiver assembly with improved diaphragms-linkage arrangement | Electricity | 22 | Expired |
| US7203334B2 | Apparatus for creating acoustic energy in a balanced receiver assembly and manufacturing method thereof | Emerging Cross-Sectional Technologies | 20 | Expired |
| US7302748B2 | Linkage assembly for an acoustic transducer | Emerging Cross-Sectional Technologies | 19 | Expired |
| US7164776B2 | Vibration balanced receiver | Electricity | 15 | Expired |
| US7366317B2 | Apparatus for creating motion amplification in a transducer with improved linkage structure | Electricity | 10 | Expired |
| US7412763B2 | Method of making an acoustic assembly for a transducer | Emerging Cross-Sectional Technologies | 10 | Active |
| US8494209B2 | Low axial vibration receiver armature and assembly | Electricity | 7 | Active |
| US4003735A | Compositions and methods for reducing herbicidal injury | Human Necessities | 7 | Expired |
| US8824726B2 | Low axial vibration receiver armature and assembly | Electricity | 6 | Active |
| US7921540B2 | System of component s usable in the manufacture of an acoustic transducer | Emerging Cross-Sectional Technologies | 6 | Active |
| US7925041B2 | Method of making a linkage assembly for a transducer and the like | Emerging Cross-Sectional Technologies | 6 | Active |
| US4379716A | Compositions and methods for reducing herbicidal injury | Human Necessities | 5 | Expired |
| US4243406A | 5-Aryl-4-isoxazolecarboxylate-safening agents | Human Necessities | 5 | Expired |
| US4507143A | Organothiophosphorous compounds useful as antidotes for thiocarbamate herbicides | Human Necessities | 4 | Expired |
| US4231786A | Compositions and methods for reducing herbicidal injury | Human Necessities | 3 | Expired |
| US4182622A | 3-Phenacylidene phthalide safening agents | Human Necessities | 2 | Expired |
| US4605431A | Compositions and methods for reducing herbicidal injury | Human Necessities | 2 | Expired |
| US4640702A | 2-chloro-4-trifluoromethyl-thiazolecarbothioic acids useful as herbicidal safeners | Human Necessities | 1 | Expired |
| US4185989A | 3-Phenacyl phthaldide safening agents | Human Necessities | 1 | Expired |
| US4239527A | 2-(Pyridylthio)pyridine-N-oxides | Human Necessities | 1 | Expired |
| US4347366A | 2-(Pyridylthio)pyridine-N-oxides | Human Necessities | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.