ARK LIMITED
32Patents
12Active
32Granted
43Portfolio score
Filing activity: Apr 30, 1975 → Nov 29, 2021 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4807375A | Plowing device | Fixed Constructions | 30 | Expired |
| USD403375S | Front surface of a jigsaw puzzle | General | 14 | Expired |
| US5151077A | Method and apparatus for perforating material | Performing Operations; Transporting | 14 | Expired |
| US7900443B2 | Particle filter arrangement | Emerging Cross-Sectional Technologies | 11 | Active |
| US5290027A | Article positioning apparatus and method for positioning an article | Performing Operations; Transporting | 10 | Expired |
| USD403376S | Front surface of a jigsaw puzzle | General | 10 | Expired |
| US5040778A | Apparatus for automatically inverting workpieces of limp sheet material | Performing Operations; Transporting | 9 | Expired |
| USD403377S | Front surface of a jigsaw puzzle | General | 9 | Expired |
| US5098079A | Apparatus for stacking pieces of limp material | Performing Operations; Transporting | 9 | Expired |
| USD403373S | Front surface of a jigsaw puzzle | General | 8 | Expired |
| USD403374S | Front surface of a jigsaw puzzle | General | 8 | Expired |
| USD403372S | Front surface of a jigsaw puzzle | General | 8 | Expired |
| US5046712A | Apparatus for handling workpieces of limp sheet material | Performing Operations; Transporting | 5 | Expired |
| US5082267A | Automatic feeder for workpieces of limp material | Performing Operations; Transporting | 4 | Expired |
| US5314178A | Automatic feeder for workpieces of limp material | Performing Operations; Transporting | 3 | Expired |
| US5167406A | Apparatus for automatically inverting workpieces of limp sheet material | Performing Operations; Transporting | 3 | Expired |
| US3965337A | Apparatus for monitoring dispensed fluid | Performing Operations; Transporting | 3 | Expired |
| US5499564A | Method and apparatus for forming a spread | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5174558A | Automatic feeder for workpieces of limp material | Performing Operations; Transporting | 2 | Expired |
| US5702085A | Support for balancing sculpture | Emerging Cross-Sectional Technologies | 2 | Expired |
| US8596195B2 | Sludge dehydrating apparatus | Chemistry; Metallurgy | 1 | Active |
| US7470365B2 | Sludge concentration system which have functions for automatically charging a coagulant and for automatically controlling the concentration of a sludge | Chemistry; Metallurgy | 1 | Active |
| US8621851B2 | Particle filter arrangement | Emerging Cross-Sectional Technologies | 1 | Active |
| US5622361A | Method of and apparatus for separating and feeding workpieces of limp material from a stack thereof | Performing Operations; Transporting | 1 | Expired |
| US11141110B2 | Body movement detection sensor | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.