Webster Spring Co. Inc.
27Patents
0Active
27Granted
30Portfolio score
Filing activity: Aug 28, 1974 → Nov 14, 1988
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4781360A | Spring assembly with helical coils of spring wire with unknotted ends | Human Necessities | 31 | Expired |
| US4577841A | Bent wire spring unit | Human Necessities | 17 | Expired |
| USD251642S | Spring coil | General | 14 | Expired |
| US4426070A | Coil spring assembly with grid and base frame | Human Necessities | 14 | Expired |
| US4666136A | Spring unit | Human Necessities | 13 | Expired |
| US4004304A | Box spring assembly | Human Necessities | 13 | Expired |
| US4685659A | Spring unit | Human Necessities | 10 | Expired |
| US4778157A | Spring module | Human Necessities | 10 | Expired |
| US4595181A | Bent wire spring unit | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4595180A | Spring assembly | Human Necessities | 8 | Expired |
| US4684111A | Bent wire spring module | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4101992A | Spring assembly with reinforcement | Human Necessities | 7 | Expired |
| US4838528A | Bent wire spring module | Human Necessities | 7 | Expired |
| US4592106A | Anchor for securing the lower end of a spring | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4729550A | Spring module | Human Necessities | 6 | Expired |
| US4480823A | Innerspring assembly for furniture seats and backs | Human Necessities | 6 | Expired |
| US4721290A | Bent wire spring unit | Human Necessities | 6 | Expired |
| US4828233A | Bent wire spring module with lock | Human Necessities | 5 | Expired |
| US4736933A | Bent wire spring module | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US3934736A | Spring stacker | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4372546A | Spring assembly | Human Necessities | 4 | Expired |
| US4114210A | Spring assembly with reinforcement | Human Necessities | 3 | Expired |
| US4796872A | Bent wire spring module | Human Necessities | 3 | Expired |
| US4813656A | Grid frame | Human Necessities | 3 | Expired |
| US3958610A | Innerspring | Performing Operations; Transporting | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.