Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
patent
|
| gptkbp:applicationNumber |
US1647A
|
| gptkbp:assignee |
gptkb:Westinghouse_Electric_Corporation
|
| gptkbp:citedBy |
gptkb:U.S._Patent_No._2,000,000
|
| gptkbp:class |
H02P
|
| gptkbp:fieldOfUse |
electric motors
|
| https://www.w3.org/2000/01/rdf-schema#label |
U.S. Patent No. 1,647
|
| gptkbp:inventor |
Walter H. Schottky
|
| gptkbp:issuedOn |
1927-10-04
|
| gptkbp:patentType |
utility patent
|
| gptkbp:relatedTo |
speed control systems
|
| gptkbp:status |
expired
|
| gptkbp:title |
Method of and apparatus for controlling the speed of an electric motor
|