Donald L. Chapman
12Patents
10h-index
8Co-inventors
61Inventor score
Filing activity: Oct 1, 1974 → Aug 27, 1993
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5023396A | Pop-up service fitting | Electricity | 103 | Expired |
| US4349220A | Raintight wireway | Electricity | 98 | Expired |
| US5024251A | Lay-in wireway assembly | Electricity | 74 | Expired |
| US4272643A | Fire resistant fitting | Electricity | 65 | Expired |
| US4270318A | Fire resistant fitting floor holes | Electricity | 56 | Expired |
| US5111538A | Knockdown portable hotwater shower and shower head therefor | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US4931597A | Junction boxes | Electricity | 23 | Expired |
| US5125199A | Floor duct with integral interlock | Electricity | 18 | Expired |
| US5415557A | Busway tap off base assembly for preventing the ingress of dust and liquids | Electricity | 16 | Expired |
| US4899506A | Large capacity electrical service fitting for concrete floors | Electricity | 14 | Expired |
| US4922672A | Snap-on underfloor preset | Electricity | 9 | Expired |
| US3937767A | Carburetor | Emerging Cross-Sectional Technologies | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.