EDGECRAFT CORPORATION
93Patents
41Active
93Granted
44Portfolio score
Filing activity: Sep 19, 1986 → May 28, 2019 · 25 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4807399A | Method and apparatus for sharpening a knife | Performing Operations; Transporting | 70 | Expired |
| US5611726A | High speed precision sharpening apparatus | Performing Operations; Transporting | 66 | Expired |
| US6012971A | Sharpening apparatus | Performing Operations; Transporting | 62 | Expired |
| US6113476A | Versatile ultrahone sharpener | Performing Operations; Transporting | 60 | Expired |
| USD409891S | Sharpener | General | 55 | Expired |
| US6267652A | Versatile ultrahone sharpener | Performing Operations; Transporting | 55 | Expired |
| US6875093B2 | Sharpening device | Performing Operations; Transporting | 54 | Expired |
| US5005319A | Knife sharpener | Performing Operations; Transporting | 53 | Expired |
| US5245791A | Scissor sharpening apparatus | Performing Operations; Transporting | 49 | Expired |
| USD303209S | Knife sharpener | General | 48 | Expired |
| USD328410S | Knife sharpener | General | 48 | Expired |
| US7235004B2 | Precision means for sharpening and creation of microblades along cutting edges | Performing Operations; Transporting | 47 | Expired |
| US6863600B2 | Apparatus for precision edge refinement of metallic cutting blades | Performing Operations; Transporting | 47 | Expired |
| US5148634A | Scissor sharpening apparatus with magnetic guide | Performing Operations; Transporting | 44 | Expired |
| US5582535A | Method and apparatus for knife and blade sharpening | Performing Operations; Transporting | 42 | Expired |
| US7517275B2 | Apparatus for precision steeling/conditioning of knife edges | Performing Operations; Transporting | 41 | Active |
| US7279660B2 | Apparatus for brewing beverages | Human Necessities | 39 | Expired |
| US6881137B2 | Manual knife sharpener with angle control | Performing Operations; Transporting | 37 | Expired |
| US5390431A | Method and apparatus for knife and blade sharpening | Performing Operations; Transporting | 37 | Expired |
| USD357395S | Knife sharpener | General | 36 | Expired |
| USD712696S1 | Food grinder | General | 36 | Active |
| US5404679A | Portable manual sharpener for knives and the like | Performing Operations; Transporting | 35 | Expired |
| USD542616S1 | Electric knife sharpener | General | 34 | Expired |
| USD543430S1 | Electric knife sharpener | General | 32 | Expired |
| USD368217S | Knife sharpener | General | 31 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.