SEIKO PRECISION INC.
257Patents
118Active
257Granted
49Portfolio score
Filing activity: Oct 10, 1991 → May 30, 2018 · 58 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5581288A | Ink jet head block | Performing Operations; Transporting | 62 | Expired |
| US6373008B1 | Light illuminating type switch | Electricity | 37 | Expired |
| US5552668A | Self-waterproofing electroluminescent device | Electricity | 36 | Expired |
| USD635035S1 | Time recorder | General | 33 | Expired |
| US6000124A | Method and apparatus for manufacturing multilayer printed circuit board | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6595653B2 | Light illuminating type switch | Electricity | 28 | Expired |
| US7330648B2 | Optical module | Physics | 26 | Expired |
| US5635416A | Manufacturing method to fabricate a semiconductor integrated circuit with on-chip non-volatile memories | Electricity | 25 | Expired |
| US6198060A | EL-combined sheet switch | Electricity | 21 | Expired |
| US6530703B2 | Focal-plane shutter having resilient stopping members for shutter blades | Physics | 21 | Expired |
| US6612762B1 | Printer | Performing Operations; Transporting | 19 | Expired |
| US5838644A | Electroluminescent display and luminous timepiece dial | Physics | 19 | Expired |
| US7605864B2 | Image pickup apparatus and electronics apparatus mounting the same | Electricity | 19 | Active |
| USD799992S1 | Time recorder | General | 19 | Active |
| US6215536A | Reflective liquid crystal display device having light scattering liquid crystal display element, and method for manufacturing reflective liquid crystal display device | Physics | 18 | Expired |
| USD553514S1 | Time recorder | General | 17 | Expired |
| US5680649A | Lens driving device for auto-focus camera | Physics | 16 | Expired |
| US6642505B1 | Reflection-type optical sensor | Physics | 14 | Expired |
| US8054340B2 | Image information management system and method | Electricity | 13 | Active |
| US6977686B2 | Solid-state image pickup apparatus limiting adhesive intrusion | Electricity | 12 | Expired |
| US5706043A | Driving method of thermal printer | Performing Operations; Transporting | 10 | Expired |
| USD553513S1 | Time recorder | General | 10 | Expired |
| US5719663A | Range finder apparatus | Physics | 10 | Expired |
| US5732295A | Camera with battery checkup function | Physics | 9 | Expired |
| US5883386A | Light-receiving apparatus having a position detectable portion on a sealing frame and its manufacturing method | Electricity | 9 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.