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View up-to-date information on Northwest Natural Holding Co patents, including inventor and filing insights.
Patent Trends
| Publication Identifier | Document Type | Title | Classification-CPC | Publication Date |
|---|---|---|---|---|
| US10465851B1 | Grant | System for compressed gas energy storage | F02C6/14; F02C6/16; F17C1/007; F17C13/002; F17C2201/052; F17C2221/033; F17C2223/0123; F17C2223/036; F17C2225/0123; F17C2225/035; F17C2227/0157; F17C2227/0302; F17C2227/0327; F17C2227/0388; F17C2265/07; F17C2270/0134; F17C2270/0152; F17C2270/0155; F17C2270/0581; F17C5/06; F17C7/00; Y02E60/16 | November 05, 2019 |
| US9803803B1 | Grant | System for compressed gas energy storage | F02C6/14; F02C6/16; F17C1/007; F17C13/002; F17C2201/052; F17C2221/033; F17C2223/0123; F17C2223/036; F17C2225/0123; F17C2225/035; F17C2227/0157; F17C2227/0302; F17C2227/0327; F17C2227/0388; F17C2265/07; F17C2270/0134; F17C2270/0152; F17C2270/0155; F17C2270/0581; F17C5/06; F17C7/00; Y02E60/16 | October 31, 2017 |
| US045302472 | Grant | Timed gas metering and distribution system | G01F1/00; G01F13/006; G01F15/063; G01F15/0755 | July 23, 1985 |
Top Inventors by Filings (Count by publication)
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