Refine My Results

Creation Date 

1. Before 1910  (2,717)
2. 1910 To 1929  (6,124)
3. 1930 To 1949  (21,261)
4. 1950 To 1952  (15,093)
5. After 1952  (11,261)
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Subject 

1. Physics  (55,452)
2. Measuring  (28,261)
3. Testing  (28,261)
4. Controlling  (27,436)
5. Regulating  (27,436)
6. Systems For Controlling Or Regulating Non-Electric Variables  (23,879)
7. Measuring Magnetic Variables  (23,296)
8. Measuring Electric Variables  (23,296)
9. Tariff Metering Apparatus  (4,718)
10. Arrangements For Measuring Two Or More Variables Not Coveredin A Single Other Subclass  (4,718)
11. Measuring Not Specially Adapted For A Specific Variable  (4,718)
12. Measuring Or Testing Not Otherwise Provided For  (4,718)
13. General Tagging Of Cross-Sectional Technologies Spanning Over Several Sections Of The Ipc  (3,986)
14. General Tagging Of New Technological Developments  (3,986)
15. Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [xracs] And Digests  (3,983)
16. Lighting  (3,948)
17. Weapons  (3,948)
18. Blasting  (3,948)
19. Heating  (3,948)
20. Mechanical Engineering  (3,948)
21. More options 

Language 

1. English  (32,484)
2. German  (11,897)
3. French  (9,164)
4. Russian  (2,715)
5. Finnish  (83)
6. Spanish  (67)
7. Japanese  (30)
8. Dutch  (26)
9. Italian  (21)
10. Danish  (15)
11. Swedish  (2)
12. More options