Refine My Results

Creation Date 

1. Before 1960  (409,086)
2. 1960 To 1975  (310,906)
3. 1976 To 1991  (539,013)
4. 1992 To 2008  (1,144,377)
5. After 2008  (1,448,338)
6. More options 

New Records 

1. New From Last Week  (17)
2. New From Last Month  (45)
3. New From Last 3 Month  (117)
4. More options 

Resource Type 

1. Patents  (3,856,190)
2. Articles  (8,327)
3. Book Chapters  (722)
4. magazinearticle  (318)
5. Conference Proceedings  (85)
6. References  (71)
7. Reports  (55)
8. Reviews  (42)
9. Books  (34)
10. Newspaper Articles  (9)
11. Newsletter Articles  (5)
12. Text Resources  (1)
13. Thesises (postgraduate)  (1)
14. More options 

Subject 

1. Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [xracs] And Digests  (3,856,190)
2. General Tagging Of Cross-Sectional Technologies Spanning Over Several Sections Of The Ipc  (3,856,190)
3. General Tagging Of New Technological Developments  (3,856,190)
4. Technical Subjects Covered By Former Uspc  (2,070,653)
5. Technologies Or Applications For Mitigation Or Adaptation Againstclimate Change  (1,870,340)
6. Technical Subjects Covered By Former Us Classification  (1,510,125)
7. Transporting  (1,365,671)
8. Performing Operations  (1,365,671)
9. Mechanical Engineering  (1,072,078)
10. Weapons  (1,072,066)
11. Heating  (1,072,062)
12. Lighting  (1,072,061)
13. Blasting  (1,072,059)
14. Chemistry  (978,005)
15. Metallurgy  (977,574)
16. Electricity  (723,152)
17. Technical Subjects Covered By Former Uspc Cross-Reference Artcollections [xracs] And Digests  (695,060)
18. Physics  (585,900)
19. Climate Change Mitigation Technologies In The Production Orprocessing Of Goods  (576,426)
20. Basic Electric Elements  (470,597)
21. More options 

Databases 

1. esp@cenet  (3,856,190)
2. ProQuest Central  (7,380)
3. DOAJ Directory of Open Access Journals  (3,317)
4. ROAD: Directory of Open Access Scholarly Resources  (2,947)
5. MEDLINE  (1,525)
6. PubMed Central  (1,488)
7. GFMER Free Medical Journals  (1,463)
8. Ebook Central - Academic Complete  (564)
9. Springer Nature OA/Free Journals  (554)
10. Coronavirus Research Database  (471)
11. ProQuest One Psychology  (433)
12. Education Resources Information Center (ERIC)  (264)
13. Public Library of Science (PLoS)  (235)
14. Wiley Online Library Open Access  (224)
15. Free E- Journals  (200)
16. Nature Open Access  (198)
17. Taylor & Francis Open Access  (163)
18. SAGE Open Access Journals  (151)
19. Hyper Article en Ligne (HAL) (Open Access)  (151)
20. HighWire Press (Free Journals)  (143)
21. More options 

Language 

1. English  (3,375,754)
2. French  (562,846)
3. Chinese  (503,834)
4. German  (468,549)
5. Korean  (112,988)
6. Japanese  (79,554)
7. Russian  (47,154)
8. Spanish  (42,959)
9. Portuguese  (26,472)
10. Swedish  (20,103)
11. Italian  (12,541)
12. Dutch  (11,602)
13. Finnish  (8,519)
14. Danish  (8,468)
15. Norwegian  (4,833)
16. Polish  (4,636)
17. Romanian  (2,169)
18. Ukrainian  (2,076)
19. Czech  (1,837)
20. Turkish  (855)
21. More options 

Journal Title 

1. Applied Sciences  (122)
2. Electronic Library  (49)
3. Frontiers In Marine Science  (52)
4. International Journal Of Molecular Sciences  (42)
5. Journal Of Documentation  (51)
6. Library Hi Tech  (48)
7. Plos One  (195)
8. Scientific Reports  (82)
9. Sensors  (77)
10. Sustainability  (129)
11. More options