WATERWORKS TECHNOLOGY DEVELOPMENT ORGANIZATION CO., LTD.
59Patents
21Active
59Granted
40Portfolio score
Filing activity: Apr 1, 1998 → Apr 27, 2021 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6056329A | Telescopic pivotal pipe joint | Emerging Cross-Sectional Technologies | 41 | Expired |
| USD453816S1 | Flexible joint | General | 36 | Expired |
| US6131957A | Fixing construction for pipe joint | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US6019396A | Pipe connecting apparatus | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US5924436A | Connecting construction of branch pipe and connecting method thereof | Emerging Cross-Sectional Technologies | 19 | Expired |
| US9890883B2 | Pipe joint, packing ring, and method for mounting pipe joint | Mechanical Engineering; Lighting; Heating | 17 | Active |
| US7354073B2 | Pipe joint | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5967168A | Method of connecting branch pipe | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6371530B1 | Tube joint | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| USD424916S | Flexible joint | General | 12 | Expired |
| US7328874B2 | Supporting device for non-averaged force | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| USD424919S | Flexible joint | General | 12 | Expired |
| USD428805S | Flexible joint | General | 12 | Expired |
| US6659511B2 | Flexible fluid-transport pipe joint apparatus | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6203073A | Tube joint | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US7717136B2 | Pipeline closing apparatus | Mechanical Engineering; Lighting; Heating | 8 | Active |
| US6305426A | Expansion tube joint and assembling method thereof | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6250690A | Expansion flexible tube joint and assembling method thereof | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| USD453552S1 | Flexible joint | General | 7 | Expired |
| USD426144S | Flexible joint | General | 6 | Expired |
| US8444187B2 | Separation prevention device for pipe joint | Emerging Cross-Sectional Technologies | 6 | Active |
| USD424918S | Flexible joint | General | 6 | Expired |
| USD481108S1 | Branch pipe joint | General | 5 | Expired |
| US6467813B1 | Reinforcement fitting | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| USD426456S | Flexible joint | General | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.