Christopher G. Estkowski
19Patents
10h-index
26Co-inventors
72Inventor score
Filing activity: Nov 5, 1986 → Nov 27, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD692555S1 | Respiratory device filter | General | 64 | Active |
| US8088189B2 | Multi-flow filtration system | Performing Operations; Transporting | 29 | Active |
| US7976598B2 | Multi-flow filtration system | Performing Operations; Transporting | 26 | Active |
| US5068943A | Dual wheel tilted axle caster with an integral retainer and bearing assembly | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US8974569B2 | Multi-flow filtration system | Performing Operations; Transporting | 23 | Active |
| USD321299S | Chair base | General | 16 | Expired |
| US4696394A | Easily removable protective covering for annular objects | Performing Operations; Transporting | 14 | Expired |
| US5230571A | Caster bearing assembly | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5232265A | Vertical back adjust for chairs | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5075924A | Tilted axle multiple wheel caster | Performing Operations; Transporting | 11 | Expired |
| USRE44972E1 | Multi-flow filtration system | General | 10 | Active |
| US5226739A | Integral retainer and bearing assembly | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| USD308815S | Caster with arcurate hood cover | General | 8 | Expired |
| US6783566B2 | Combination filter/cartridge assembly | Emerging Cross-Sectional Technologies | 6 | Expired |
| US10835704B1 | Reusable respiratory protection device | Human Necessities | 5 | Active |
| US4763383A | Electrically conductive caster having loop depending rings | Performing Operations; Transporting | 4 | Expired |
| US9352268B2 | Filter asssembly for a respirator | Human Necessities | 1 | Active |
| US11642487B2 | Reusable respiratory protection device | Human Necessities | 0 | Active |
| US12337200B2 | Respirator apparatus | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.