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Creation Date 

1. Before 1960  (360)
2. 1960 To 1975  (389)
3. 1976 To 1991  (848)
4. 1992 To 2008  (2,752)
5. After 2008  (28,551)
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New Records 

1. New From Last Month  (26)
2. New From Last 3 Month  (1,295)
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Subject 

1. Machines Or Auxiliary Tools For Construction Or Repair  (13,331)
2. Construction Of, Or Surfaces For, Roads, Sports Grounds, Orthe Like  (13,331)
3. Construction Of Bridges  (8,790)
4. Or Viaducts  (8,790)
5. Assembly Of Bridges  (8,790)
6. Transporting  (2,598)
7. Performing Operations  (2,598)
8. Cleaning Beaches  (2,455)
9. Fog In General  (2,455)
10. Cleaning Of Permanent Ways  (2,455)
11. Street Cleaning  (2,455)
12. Dispersing  (2,455)
13. Physics  (2,007)
14. Soil Shifting  (1,567)
15. Hydraulic Engineering  (1,567)
16. Foundations  (1,567)
17. Embankments  (1,365)
18. Excavations  (1,365)
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Language 

1. English  (31,547)
2. Chinese  (26,123)
3. French  (1,055)
4. German  (520)
5. Korean  (213)
6. Russian  (172)
7. Japanese  (116)
8. Spanish  (105)
9. Portuguese  (48)
10. Italian  (45)
11. Danish  (32)
12. Norwegian  (30)
13. Swedish  (25)
14. Dutch  (22)
15. Czech  (19)
16. Ukrainian  (14)
17. Polish  (13)
18. Finnish  (12)
19. Romanian  (9)
20. Bulgarian  (6)
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