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Creation Date 

1. Before 1959  (331)
2. 1959 To 1961  (563)
3. 1962 To 1964  (731)
4. 1965 To 1968  (1,235)
5. After 1968  (2,924)
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New Records 

1. New From Last 3 Month  (2)
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Subject 

1. Transporting  (1,727)
2. Performing Operations  (1,727)
3. Lighting  (1,132)
4. Weapons  (1,132)
5. Blasting  (1,132)
6. Heating  (1,132)
7. Mechanical Engineering  (1,132)
8. Human Necessities  (925)
9. Engineering Elements And Units  (887)
10. Thermal Insulation In General  (887)
11. General Measures For Producing And Maintaining Effectivefunctioning Of Machines Or Installations  (887)
12. Electricity  (826)
13. Basic Electric Elements  (703)
14. Working Of Substances In A Plastic State, In General  (547)
15. Working Of Plastics  (547)
16. Line Connectors  (547)
17. Current Collectors  (547)
18. Shaping Or Joining Of Plastics  (516)
19. Shaping Of Material In A Plastic State, Not Otherwise Providedfor  (516)
20. After-Treatment Of The Shaped Products, E.G. Repairing  (516)
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Language 

1. English  (4,895)
2. Spanish  (2,052)
3. German  (534)
4. French  (238)
5. Danish  (98)
6. Italian  (21)
7. Dutch  (10)
8. Swedish  (2)
9. Finnish  (2)
10. Japanese  (1)
11. Turkish  (1)
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