D. Michael Williams
21Patents
10h-index
10Co-inventors
68Inventor score
Filing activity: Dec 2, 1977 → Jan 18, 1990
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4722713A | Baby's toy and things to arouse attention therefor | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4962490A | Acoustic logging method for determining the dip angle and dip direction of a subsurface formation fracture | Physics | 28 | Expired |
| US4720283A | Baby's marble runway toy | Human Necessities | 25 | Expired |
| USD275022S | Puzzle toy | General | 17 | Expired |
| US4575828A | Method for distinguishing between total formation permeability and fracture permeability | Physics | 15 | Expired |
| USD254795S | Toy rattle | General | 14 | Expired |
| US4249333A | Infant development ring toy | Human Necessities | 13 | Expired |
| USD299936S | Support for toy mobile | General | 11 | Expired |
| US4972384A | Method for identifying hydrocarbon-zones in subsurface formations | Physics | 10 | Expired |
| USD254860S | Combined grasping and handling toy rattle or similar article | General | 10 | Expired |
| USD299935S | Mobile element | General | 9 | Expired |
| US4861309A | Spiral cylinder toy | Human Necessities | 8 | Expired |
| USD261970S | Display device | General | 6 | Expired |
| USD288576S | Stackable rattle | General | 6 | Expired |
| USD295198S | Crib attachment toy | General | 6 | Expired |
| USD263405S | Combined grasping and handling toy rattle or similar article | General | 5 | Expired |
| USD269533S | Rolling toy | General | 5 | Expired |
| USD293000S | Rattle bird toy | General | 3 | Expired |
| USD255135S | Animate figure toy | General | 3 | Expired |
| USD258160S | Combined toy harbor, village and figure therefor | General | 1 | Expired |
| USD294840S | Spinner paddle toy | General | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.