Statements (15)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:US_patent
|
| gptkbp:applicationDeadline |
November 4, 1879
|
| gptkbp:assignee |
gptkb:Thomas_Edison
|
| gptkbp:citation |
subsequent electric lamp patents
|
| gptkbp:country |
gptkb:United_States
|
| gptkbp:date |
January 27, 1880
|
| gptkbp:describes |
carbon filament lamp
|
| gptkbp:fieldOfInvention |
electric lighting
|
| https://www.w3.org/2000/01/rdf-schema#label |
US Patent 220925
|
| gptkbp:inventedBy |
gptkb:Thomas_Edison
|
| gptkbp:publishedIn |
US220925A
|
| gptkbp:status |
expired
|
| gptkbp:title |
Improvement in Electric Lamps
|
| gptkbp:bfsParent |
gptkb:Margaret_Rose_Knight
|
| gptkbp:bfsLayer |
7
|