Refine My Results

Creation Date 

1. Before 1960  (163,816)
2. 1960 To 1975  (163,836)
3. 1976 To 1991  (204,036)
4. 1992 To 2008  (426,580)
5. After 2008  (4,608,510)
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New Records 

1. New From Last Month  (330,652)
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Subject 

1. Transporting  (2,241,772)
2. Performing Operations  (2,241,772)
3. Human Necessities  (1,174,180)
4. Physics  (1,113,463)
5. Lighting  (926,433)
6. Weapons  (926,433)
7. Blasting  (926,433)
8. Heating  (926,433)
9. Mechanical Engineering  (926,433)
10. Fixed Constructions  (858,533)
11. Their Treatment, Not Covered By Other Classes  (811,964)
12. Foods Or Foodstuffs  (811,964)
13. Chemistry  (725,026)
14. Metallurgy  (725,026)
15. Building  (702,126)
16. Measuring  (639,359)
17. Testing  (639,359)
18. Engineering Elements And Units  (575,307)
19. Thermal Insulation In General  (575,307)
20. General Measures For Producing And Maintaining Effectivefunctioning Of Machines Or Installations  (575,307)
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Databases 

1. esp@cenet  (5,567,118)
2. Universidade do Porto Institutional Repository Open Access  (4)
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Language 

1. Chinese  (3,815,120)
2. English  (3,536,947)
3. German  (595,934)
4. French  (543,052)
5. Japanese  (472,674)
6. Spanish  (189,070)
7. Portuguese  (81,739)
8. Italian  (52,109)
9. Swedish  (17,483)
10. Dutch  (16,860)
11. Danish  (15,183)
12. Norwegian  (14,027)
13. Turkish  (8,734)
14. Romanian  (5,449)
15. Arabic  (573)
16. Russian  (463)
17. Finnish  (449)
18. Polish  (129)
19. Hungarian  (25)
20. Slovenian  (13)
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