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Creation Date 

1. Before 1960  (8,078)
2. 1960 To 1975  (30,372)
3. 1976 To 1991  (116,629)
4. 1992 To 2008  (255,052)
5. After 2008  (480,934)
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New Records 

1. New From Last Month  (16,954)
2. New From Last 3 Month  (16,974)
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Resource Type 

1. Patents  (888,454)
2. Articles  (2,360)
3. magazinearticle  (267)
4. Reports  (150)
5. Book Chapters  (94)
6. Conference Proceedings  (47)
7. Books  (32)
8. Thesises (postgraduate)  (27)
9. Other  (6)
10. References  (6)
11. Text Resources  (3)
12. Web Resources  (3)
13. Newspaper Articles  (2)
14. Images  (2)
15. Videos  (1)
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Subject 

1. Heating  (888,469)
2. Lighting  (888,462)
3. Weapons  (888,456)
4. Blasting  (888,454)
5. Engineering Elements And Units  (342,021)
6. Thermal Insulation In General  (342,021)
7. General Measures For Producing And Maintaining Effectivefunctioning Of Machines Or Installations  (342,021)
8. Transporting  (166,569)
9. Performing Operations  (166,569)
10. Positive Displacement Machines For Liquids  (132,417)
11. Pumps For Liquids Or Elastic Fluids  (132,417)
12. Hot-Gas Or Combustion-Product Engine Plants  (104,397)
13. Combustion Engines  (104,397)
14. Ventilating  (100,102)
15. Ranges  (100,102)
16. Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [xracs] And Digests  (96,304)
17. General Tagging Of Cross-Sectional Technologies Spanning Over Several Sections Of The Ipc  (96,304)
18. General Tagging Of New Technological Developments  (96,304)
19. Steam Engines  (92,031)
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Databases 

1. esp@cenet  (888,454)
2. ProQuest Central  (2,256)
3. Springer Nature OA/Free Journals  (391)
4. DOAJ Directory of Open Access Journals  (376)
5. ROAD: Directory of Open Access Scholarly Resources  (245)
6. NASA Technical Reports Server  (183)
7. GFMER Free Medical Journals  (91)
8. Ebook Central - Academic Complete  (73)
9. PubMed Central  (69)
10. MEDLINE  (57)
11. ProQuest One Psychology  (52)
12. Hyper Article en Ligne (HAL) (Open Access)  (49)
13. SWEPUB Freely available online  (41)
14. Public Library of Science (PLoS)  (24)
15. IOP Publishing Free Content  (17)
16. SAGE Open Access Journals  (16)
17. IOPscience (Open Access)  (14)
18. Coronavirus Research Database  (10)
19. ScholarVox International  (10)
20. Freely Accessible Journals  (9)
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Language 

1. English  (752,675)
2. German  (188,591)
3. French  (187,336)
4. Chinese  (117,137)
5. Korean  (45,070)
6. Japanese  (39,745)
7. Spanish  (17,979)
8. Russian  (15,656)
9. Italian  (8,659)
10. Portuguese  (8,089)
11. Swedish  (4,680)
12. Danish  (3,694)
13. Norwegian  (2,727)
14. Dutch  (2,706)
15. Polish  (2,388)
16. Finnish  (1,961)
17. Czech  (869)
18. Ukrainian  (547)
19. Turkish  (522)
20. Hungarian  (485)
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Journal Title 

1. Chinese Journal Of Mechanical Engineering  (62)
2. Forschung Im Ingenieurwesen  (66)
3. International Journal Of Advanced Manufacturing Technology  (568)
4. Journal Of Economic Perspectives  (94)
5. Journal Of Mechanical Science And Technology  (197)
6. Machine Design  (51)
7. Mechanical Engineering  (130)
8. Microsystem Technologies : Sensors, Actuators, Systems Integration  (61)
9. Nonlinear Dynamics  (75)
10. The Journal Of Economic Perspectives  (94)
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