Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:US_patent
|
| gptkbp:assignee |
gptkb:Thomas_A._Edison
|
| gptkbp:country |
gptkb:United_States
|
| gptkbp:fieldOfInvention |
telegraphy
|
| gptkbp:filingDate |
1878-10-09
|
| gptkbp:inventedBy |
gptkb:Thomas_A._Edison
|
| gptkbp:patent |
390721
|
| gptkbp:publicationDate |
1888-10-09
|
| gptkbp:status |
expired
|
| gptkbp:title |
Improvement in telegraphy
|
| gptkbp:bfsParent |
gptkb:US390721A_(dynamo-electric_machine)
|
| gptkbp:bfsLayer |
8
|
| https://www.w3.org/2000/01/rdf-schema#label |
US390721A
|