ations.
Granting Interference. Steps in Interference. First Sketches. First
Model. First Operative Machine. Preliminary Statements. Proving
Invention. What Patents Are Issued For. Owner's Rights. Divided and
Undivided Patents. Assignments. How Made. What an Invention Must Have.
Basis for Granting Patent in the United States. Reasons for Granting
Abroad. Original Grants of Patents. International Agreement.
Application for Patents. Course of Procedure. Costs. Filing a Matter of
Secrecy.

LIST OF ILLUSTRATIONS

FIG. PAGE
1. Bench vise 8
2. Pipe grip for vise 9
3. Swivel vise 10
4. Speed lathe 11
5. Calipers 12
6. Engine lathe 13
7. Center gage 14
8. Pocket screw and wire gage 15
9. Handy bench vise 16
10. Combination square 17
11. Uses of the combination square 18
12. A quick adjusting micrometer 19
13. Universal bevel protractor 20
14. Uses of universal bevel protractor 21
15. Grindstone truing device 22
16. Set of tools and case 23
17. The work bench 24
18. Hook tool 28
19. Parting tool 28
20. Knife tool 28
21. Right-hand side tool 28
22. Internal tool 28
23. Left-hand side tool 28
24. Tool for wrought iron 29
25. Tool for cast iron 29
26. End view of drill 31
27. Side view