Statements (12)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:US_patent
|
| gptkbp:application |
618428
|
| gptkbp:assignee |
gptkb:Thomas_Edison
|
| gptkbp:country |
gptkb:United_States
|
| gptkbp:date |
January 24, 1899
|
| gptkbp:fieldOfInvention |
electric lamps
|
| https://www.w3.org/2000/01/rdf-schema#label |
US Patent 618428
|
| gptkbp:inventedBy |
gptkb:Thomas_Edison
|
| gptkbp:status |
expired
|
| gptkbp:title |
Improvement in Electric Lamps
|
| gptkbp:bfsParent |
gptkb:William_H._Morrison
|
| gptkbp:bfsLayer |
7
|