Willis Electric Co., Ltd.
128Patents
111Active
128Granted
58Portfolio score
Filing activity: Nov 9, 2000 → Sep 20, 2024 · 11 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8298633B1 | Multi-positional, locking artificial tree trunk | Emerging Cross-Sectional Technologies | 113 | Active |
| US8454186B2 | Modular lighted tree with trunk electical connectors | Emerging Cross-Sectional Technologies | 95 | Active |
| US8454187B2 | Modular lighted tree | Emerging Cross-Sectional Technologies | 94 | Active |
| US6951405B2 | Decorative light strings with combinative tree | Human Necessities | 89 | Expired |
| US7055981B2 | Stretchable and shrinkable tree light strings | Emerging Cross-Sectional Technologies | 88 | Expired |
| US8568015B2 | Decorative light string for artificial lighted tree | Emerging Cross-Sectional Technologies | 78 | Active |
| US7554266B1 | Mechanical shunt for use in a socket in a string of lights | Mechanical Engineering; Lighting; Heating | 70 | Active |
| US8936379B1 | Modular lighted tree | Emerging Cross-Sectional Technologies | 65 | Active |
| US8974072B2 | Modular lighted tree with trunk electrical connectors | Emerging Cross-Sectional Technologies | 62 | Active |
| US9044056B2 | Modular tree with electrical connector | Electricity | 60 | Active |
| US8569960B2 | Conformal power adapter for lighted artificial tree | Emerging Cross-Sectional Technologies | 57 | Active |
| US8870404B1 | Dual-voltage lighted artificial tree | Emerging Cross-Sectional Technologies | 56 | Active |
| US9055777B2 | Modular artificial lighted tree with decorative light string | Emerging Cross-Sectional Technologies | 56 | Active |
| US9066617B2 | Multi-positional, locking artificial tree trunk | Emerging Cross-Sectional Technologies | 53 | Active |
| US8469750B2 | LED lamp assembly and light strings including a lamp assembly | Electricity | 52 | Active |
| USD696153S1 | Artificial tree trunk | General | 50 | Active |
| US8876321B2 | Modular lighted artificial tree | Emerging Cross-Sectional Technologies | 49 | Active |
| USD686523S1 | Artificial tree trunk | General | 49 | Active |
| US8608342B2 | Wire-piercing light-emitting diode light strings | Emerging Cross-Sectional Technologies | 47 | Active |
| US8562175B2 | Wire-piercing light-emitting diode illumination assemblies | Emerging Cross-Sectional Technologies | 47 | Active |
| US8592845B2 | Wire-piercing light-emitting diode lamps | Emerging Cross-Sectional Technologies | 44 | Active |
| US9439528B2 | Modular tree with locking trunk and locking electrical connectors | Emerging Cross-Sectional Technologies | 41 | Active |
| US8853721B2 | Light-emitting diode with wire-piercing lead frame | Emerging Cross-Sectional Technologies | 38 | Active |
| US9441800B1 | Modular lighted artificial tree | Emerging Cross-Sectional Technologies | 37 | Active |
| US9441823B1 | Modular lighted artificial tree | Emerging Cross-Sectional Technologies | 37 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.