Refine My Results

Creation Date 

1. Before 1960  (65,425)
2. 1960 To 1975  (81,116)
3. 1976 To 1991  (334,093)
4. 1992 To 2008  (419,564)
5. After 2008  (1,101,025)
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New Records 

1. New From Last Month  (5,891)
2. New From Last 3 Month  (60,614)
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Subject 

1. Air-Conditioning, Air-Humidification, Ventilation, Use Of Aircurrents For Screening  (900,511)
2. Other Domestic Stoves Or Ranges  (351,427)
3. Details Of Domestic Stoves Or Ranges, Of General Application  (351,427)
4. Fluid Heaters, E.G. Water Or Air Heaters, Having Heatgenerating Means, In General  (351,321)
5. Domestic- Or Space-Heating Systems, E.G. Central Heatingsystems  (229,834)
6. Domestic Hot-Water Supply Systems  (229,834)
7. Elements Or Components Therefor  (229,834)
8. Electricity  (206,206)
9. Transporting  (177,690)
10. Performing Operations  (177,690)
11. Solar Heat Collectors  (157,353)
12. Solar Heat Systems  (157,353)
13. Human Necessities  (153,058)
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Language 

1. English  (1,660,767)
2. Chinese  (652,260)
3. French  (196,363)
4. German  (185,246)
5. Korean  (97,324)
6. Japanese  (67,755)
7. Spanish  (28,345)
8. Russian  (17,015)
9. Italian  (15,141)
10. Swedish  (10,199)
11. Portuguese  (9,236)
12. Finnish  (7,992)
13. Polish  (6,610)
14. Danish  (5,363)
15. Dutch  (5,292)
16. Norwegian  (3,407)
17. Turkish  (2,507)
18. Czech  (1,931)
19. Ukrainian  (1,492)
20. Romanian  (997)
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