Refine My Results

Creation Date 

1. Before 1958  (68)
2. 1958 To 1975  (44)
3. 1976 To 1990  (942)
4. 1991 To 2006  (1,507)
5. After 2006  (21,415)
6. More options 

New Records 

1. New From Last Month  (240)
2. New From Last 3 Month  (1,795)
3. More options 

Resource Type 

1. Patents  (19,027)
2. Articles  (4,381)
3. magazinearticle  (393)
4. Book Chapters  (53)
5. Reviews  (34)
6. Books  (22)
7. Newspaper Articles  (22)
8. Web Resources  (21)
9. Images  (19)
10. Reports  (5)
11. Thesises (postgraduate)  (5)
12. Conference Proceedings  (5)
13. Datasets  (3)
14. References  (1)
15. More options 

Subject 

1. Transporting  (14,873)
2. Performing Operations  (14,873)
3. Machine Tools  (12,674)
4. Metal-Working Not Otherwise Provided For  (12,674)
5. Welding  (12,320)
6. Working By Laser Beam  (12,311)
7. Soldering Or Unsoldering  (12,311)
8. Cutting By Applying Heat Locally, E.G. Flame Cutting  (12,311)
9. Cladding Or Plating By Soldering Or Welding  (12,311)
10. Electricity  (2,195)
11. Chemistry  (1,575)
12. Metallurgy  (1,451)
13. Basic Electric Elements  (1,298)
14. Physics  (1,053)
15. Human Necessities  (742)
16. Semiconductor Devices  (686)
17. Electric Solid State Devices Not Otherwise Provided For  (686)
18. Mechanical Engineering  (678)
19. Lighting  (669)
20. Heating  (668)
21. More options 

Databases 

1. esp@cenet  (18,971)
2. ProQuest Central  (690)
3. DOAJ Directory of Open Access Journals  (414)
4. ROAD: Directory of Open Access Scholarly Resources  (275)
5. Geneva Foundation Free Medical Journals at publisher websites  (171)
6. PubMed Central  (157)
7. MEDLINE  (132)
8. Ebook Central - Academic Complete  (52)
9. USPTO Issued Patents  (47)
10. SpringerOpen  (39)
11. Institute of Physics - IOP eJournals - Open Access  (32)
12. IOPscience (Open Access)  (29)
13. IngentaConnect Backfiles  (29)
14. Open Access: Freely Accessible Journals by multiple vendors  (27)
15. Europeana Collections  (23)
16. Medknow Medical Journals (Open access)  (16)
17. Freely Accessible Japanese Titles  (15)
18. Nature Free  (13)
19. Coronavirus Research Database  (13)
20. Open Access: Wiley-Blackwell Open Access Journals  (13)
21. More options 

Language 

1. Chinese  (21,465)
2. English  (13,416)
3. Korean  (414)
4. Japanese  (185)
5. French  (149)
6. Spanish  (70)
7. German  (64)
8. Portuguese  (19)
9. Swedish  (9)
10. Italian  (7)
11. Polish  (1)
12. Persian  (1)
13. Slovenian  (1)
14. Turkish  (1)
15. More options 

Journal Title 

1. Forest Research  (39)
2. Journal Of Structural Engineering, A  (23)
3. 世界农业  (36)
4. 农民致富之友  (50)
5. 化工管理  (42)
6. 文学教育  (23)
7. 構造工学論文集 A  (30)
8. 科技创新与应用  (93)
9. 科技资讯  (79)
10. 设备管理与维修  (95)
11. More options