ALPHA TECHNOLOGIES LTD.
32Patents
17Active
32Granted
49Portfolio score
Filing activity: Dec 6, 1984 → Jun 5, 2020
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5961604A | Status monitoring systems for cable television signal distribution networks | Electricity | 192 | Expired |
| US5642002A | Apparatus and methods for generating uninterruptible AC power signals | Electricity | 98 | Expired |
| US6841971B1 | Charge balancing systems and methods | Emerging Cross-Sectional Technologies | 76 | Expired |
| US5410720A | Apparatus and methods for generating an AC power signal for cable TV distribution systems | Electricity | 67 | Expired |
| US6602627B2 | Uninterruptible power supplies using fuel cells | Emerging Cross-Sectional Technologies | 61 | Expired |
| US6014015A | Electrical generator employing rotary engine | Electricity | 60 | Expired |
| US6288916A | Multiple output uninterruptible alternating current power supplies for communications system | Emerging Cross-Sectional Technologies | 51 | Expired |
| US5638244A | Apparatus and methods for generating uninterruptible AC power signals | Electricity | 50 | Expired |
| US5760495A | Inverter/charger circuit for uninterruptible power supplies | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5892431A | Power multiplexer for broadband communications systems | Electricity | 40 | Expired |
| US5739595A | Apparatus and methods for generating an AC power signal for cable tv distribution systems | Emerging Cross-Sectional Technologies | 32 | Expired |
| US7182632B1 | Connection systems and methods for utility meters | Physics | 31 | Expired |
| US7040920B2 | Connection systems and methods for utility meters | Physics | 30 | Expired |
| US10074981B2 | Power control systems and methods | Emerging Cross-Sectional Technologies | 20 | Active |
| US8575779B2 | Ferroresonant transformer for use in uninterruptible power supplies | Emerging Cross-Sectional Technologies | 14 | Active |
| US4573900A | Evacuation system for injection molding machines | Performing Operations; Transporting | 13 | Expired |
| US9234916B2 | Status monitoring cables for generators | Emerging Cross-Sectional Technologies | 10 | Active |
| US9030048B2 | Uninterruptible power supply systems and methods for communications systems | Emerging Cross-Sectional Technologies | 10 | Active |
| US9030045B2 | Switching systems and methods for use in uninterruptible power supplies | Emerging Cross-Sectional Technologies | 9 | Active |
| US9312726B2 | Uninterruptible power supplies for use in a distributed network | Emerging Cross-Sectional Technologies | 8 | Active |
| US9633781B2 | Ferroresonant transformer for use in uninterruptible power supplies | Emerging Cross-Sectional Technologies | 8 | Active |
| US6164818A | Method and apparatus for measuring viscous heating of viscoelastic materials | Physics | 7 | Expired |
| US9397509B2 | Charge equalization systems and methods for battery systems and uninterruptible power supplies | Emerging Cross-Sectional Technologies | 6 | Active |
| US9853497B2 | Charge equalization systems and methods for battery systems and uninterruptible power supplies | Emerging Cross-Sectional Technologies | 5 | Active |
| US9037443B1 | Systems and methods for solar power equipment | Emerging Cross-Sectional Technologies | 4 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.