IWAKI CO., LTD.
36Patents
17Active
36Granted
46Portfolio score
Filing activity: Mar 7, 1975 → May 13, 2021 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4013384A | Magnetically driven centrifugal pump and means providing cooling fluid flow | Mechanical Engineering; Lighting; Heating | 89 | Expired |
| US4047847A | Magnetically driven centrifugal pump | Mechanical Engineering; Lighting; Heating | 82 | Expired |
| US6302660A | Tube pump with flexible tube diaphragm | Mechanical Engineering; Lighting; Heating | 41 | Expired |
| US6443710B1 | Magnetic pump | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US5464333A | Magnet pump with rear thrust bearing member | Electricity | 29 | Expired |
| US5665200A | Substrate processing method and substrate processing apparatus | Physics | 28 | Expired |
| US6874997B2 | Pump system using a control fluid to drive a switching valve mechanism for an actuating fluid | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US7249939B2 | Rear casing arrangement for magnetic drive pump | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US5165866A | Bellows pump | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US7683514B2 | Hybrid magnetic bearing | Mechanical Engineering; Lighting; Heating | 19 | Active |
| US4272225A | Electromagnetically-operated fixed displacement pump | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5477881A | Tank for pump | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6814553B2 | Dual reciprocating bellows pump, with a pair of interlocking shafts passing through a common pump head and dual pump chambers | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| USD296556S | Bellows pump | General | 7 | Expired |
| US5330330A | Electromagnetically operated fixed displacement pump | Electricity | 7 | Expired |
| US4684333A | Self-priming pump | Emerging Cross-Sectional Technologies | 7 | Expired |
| USD361822S | Tank used for pump | General | 5 | Expired |
| US8288906B2 | Maglev motor and pump | Mechanical Engineering; Lighting; Heating | 5 | Active |
| USD300034S | Bellows pump | General | 5 | Expired |
| US9239047B2 | Bellows pump | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US7977838B2 | Magnetic levitation motor and pump | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US10890190B2 | Magnetic pump | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US7800269B2 | Hybrid magnetic bearing | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US6843645B2 | Cooling system for a magnetic pump | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US11313362B2 | Tubephragm pump | Mechanical Engineering; Lighting; Heating | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.