Key Knife, Inc.
34Patents
7Active
34Granted
36Portfolio score
Filing activity: Jul 21, 1993 → Jan 28, 2013 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5819826A | Chip cutting knife with spaced deflector ridges | Performing Operations; Transporting | 30 | Expired |
| US5709255A | Chipper with detachable facing knives | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5511597A | Slabbing chipper with replaceable knives and wear plate | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5333659A | Knife holder | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6968879B2 | Knife and apparatus for clamping a knife | Performing Operations; Transporting | 17 | Expired |
| US6591878B2 | Method and apparatus for clamping a knife | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5979522A | Knife holder for a chipper disc | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5816301A | Knife supporting structure | Emerging Cross-Sectional Technologies | 15 | Expired |
| US7069969B2 | Wood cutting knife assembly providing improved knife stability | Emerging Cross-Sectional Technologies | 14 | Expired |
| US7140408B1 | Knife assembly and chipping knife therefor | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5617908A | Chipping cutter head including end cutting knives | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6267164A | Chip and method for the production of wood pulp | Emerging Cross-Sectional Technologies | 10 | Expired |
| USRE36659E | Chipper with detachable facing knives | General | 10 | Expired |
| US8033308B2 | Double-sided wear insert for a chipper | Emerging Cross-Sectional Technologies | 9 | Active |
| US6167929A | Method and apparatus for profiling a log | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6058992A | Method and apparatus for profiling a log | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6712105B1 | Method and apparatus for planing an article of wood | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6757952B1 | Ring slicer with easily removable knife and knife assembly | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6688351B2 | Adjustable profiling head for a wood cutting apparatus | Performing Operations; Transporting | 7 | Expired |
| USRE38930E1 | Knife holder for a chipper disc | General | 6 | Expired |
| US7677282B2 | Knife assembly and chipping knife therefor | Emerging Cross-Sectional Technologies | 6 | Active |
| US8225828B2 | Modular conical chipper/canter head and method | Performing Operations; Transporting | 4 | Active |
| US7343946B2 | High speed planer head | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6637483B2 | Method and apparatus for profiling a log | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7891388B2 | Knife and knife assembly for a planer side head | Emerging Cross-Sectional Technologies | 4 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.