Mitchell I. Kieffer
19Patents
8h-index
12Co-inventors
65Inventor score
Filing activity: Aug 2, 2002 → Oct 12, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD624200S1 | Step ladder | General | 22 | Expired |
| US6708800B2 | Extending ladder and associated manufacturing methods | Emerging Cross-Sectional Technologies | 16 | Expired |
| US9416591B2 | Telescoping ladder with stabilizers | Fixed Constructions | 15 | Active |
| US8387753B2 | Ergonomic extendable/retractable ladder | Fixed Constructions | 12 | Active |
| US6883645B2 | Extending ladder and associated manufacturing methods | Emerging Cross-Sectional Technologies | 11 | Expired |
| US8225906B2 | Extendable/retractable ladder | Emerging Cross-Sectional Technologies | 10 | Active |
| US7048094B2 | Extending ladder and associated manufacturing methods | Emerging Cross-Sectional Technologies | 9 | Expired |
| US10233692B2 | Foldable ladder | Fixed Constructions | 9 | Active |
| US9580959B2 | Foldable ladder | Fixed Constructions | 8 | Active |
| USD684278S1 | Collapsible five legged stepstool | General | 5 | Active |
| USD593685S1 | Telescoping ladder rung | General | 5 | Expired |
| USD767784S1 | Hinge for a telescoping stepladder | General | 4 | Active |
| USD665927S1 | Metal and wood step ladder | General | 3 | Active |
| US11174678B2 | Locking assembly for a telescoping ladder | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US10053912B2 | Extendable / retractable ladder | Emerging Cross-Sectional Technologies | 2 | Active |
| US10731413B2 | Foldable ladder | Fixed Constructions | 1 | Active |
| US10753149B2 | Extendable / retractable ladder | Emerging Cross-Sectional Technologies | 1 | Active |
| US10995547B2 | Telescoping ladder with a cascading collapse mechanism | Fixed Constructions | 0 | Active |
| US11795760B2 | Ladder tripod assembly and system | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.