Refine My Results

Creation Date 

1. Before 1960  (113,070)
2. 1960 To 1975  (97,426)
3. 1976 To 1991  (406,221)
4. 1992 To 2008  (595,445)
5. After 2008  (804,467)
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New Records 

1. New From Last Week  (845)
2. New From Last Month  (28,109)
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Subject 

1. Supplying Combustion Engines In General, With Combustiblemixtures Or Constituents Thereof  (649,627)
2. Controlling Combustion Engines  (592,106)
3. Internal-Combustion Piston Engines  (561,287)
4. Combustion Engines In General  (561,287)
5. Steam Engines  (424,469)
6. Machines Or Engines In General  (424,469)
7. Engine Plants In General  (424,469)
8. Transporting  (330,077)
9. Performing Operations  (330,077)
10. Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [xracs] And Digests  (318,633)
11. General Tagging Of Cross-Sectional Technologies Spanning Over Several Sections Of The Ipc  (318,633)
12. General Tagging Of New Technological Developments  (318,633)
13. Technologies Or Applications For Mitigation Or Adaptation Againstclimate Change  (274,542)
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Language 

1. English  (1,614,875)
2. German  (359,225)
3. French  (331,135)
4. Chinese  (210,123)
5. Japanese  (91,874)
6. Korean  (60,773)
7. Russian  (31,860)
8. Spanish  (23,524)
9. Italian  (22,674)
10. Portuguese  (16,964)
11. Swedish  (11,045)
12. Finnish  (3,926)
13. Danish  (3,451)
14. Dutch  (2,842)
15. Polish  (2,766)
16. Norwegian  (2,176)
17. Czech  (1,347)
18. Ukrainian  (1,332)
19. Romanian  (1,101)
20. Turkish  (823)
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