Refine My Results

Creation Date 

1. Before 1959  (376,706)
2. 1959 To 1973  (198,805)
3. 1974 To 1988  (413,317)
4. 1989 To 2004  (759,363)
5. After 2004  (1,682,462)
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Subject 

1. Technical Subjects Covered By Former Uspc  (1,838,739)
2. Technologies Or Applications For Mitigation Or Adaptation Againstclimate Change  (1,680,403)
3. Technical Subjects Covered By Former Us Classification  (1,346,792)
4. Transporting  (1,206,857)
5. Performing Operations  (1,206,857)
6. Lighting  (924,445)
7. Weapons  (924,445)
8. Blasting  (924,445)
9. Heating  (924,445)
10. Mechanical Engineering  (924,445)
11. Chemistry  (873,502)
12. Metallurgy  (873,502)
13. Electricity  (668,574)
14. Technical Subjects Covered By Former Uspc Cross-Reference Artcollections [xracs] And Digests  (609,327)
15. Physics  (531,593)
16. Climate Change Mitigation Technologies In The Production Orprocessing Of Goods  (530,365)
17. Basic Electric Elements  (435,783)
18. More options 

Language 

1. English  (3,272,779)
2. Chinese  (503,913)
3. French  (424,325)
4. German  (242,009)
5. Korean  (113,016)
6. Japanese  (79,009)
7. Russian  (47,091)
8. Finnish  (8,358)
9. Swedish  (7,125)
10. Spanish  (4,644)
11. Polish  (4,610)
12. Portuguese  (2,992)
13. Norwegian  (2,440)
14. Dutch  (2,393)
15. Ukrainian  (2,076)
16. Danish  (2,036)
17. Czech  (1,832)
18. Italian  (1,465)
19. Romanian  (674)
20. More options