Properties (11)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
patent
|
| gptkbp:applicationNumber |
gptkb:US_493426_A
|
| gptkbp:assignee |
gptkb:Houghton_&_Dutton
|
| gptkbp:country |
gptkb:United_States
|
| gptkbp:fieldOfUse |
paper manufacturing
|
| https://www.w3.org/2000/01/rdf-schema#label |
US Patent 493,426
|
| gptkbp:inventor |
George_W._H._Houghton
|
| gptkbp:issuedOn |
June 14, 1892
|
| gptkbp:patentType |
utility patent
|
| gptkbp:status |
expired
|
| gptkbp:title |
Improvement in the Art of Making Paper
|