Dove-tailed building block
FIG. 1 is a top right perspective view of a dove-tailed building block showing my new design;
FIG. 2 is a bottom right side perspective view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a top right side perspective view of a second embodiment of a dove-tailed building block showing my new design;
FIG. 5 is a bottom right side perspective view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a top right side perspective view of a third embodiment of a dove-tailed building block showing my new design;
FIG. 8 is a bottom right side perspective view thereof;
FIG. 9 is a left side elevational view thereof;
FIG. 10 is a top right side perspective view of a fourth embodiment of a dove-tailed building block showing my new design;
FIG. 11 is a bottom right side perspective view thereof; and,
FIG. 12 is a left side elevational view thereof.
| D238168 | December 1975 | Ketcham |
| 457982 | August 1891 | Bohme |
| 1097148 | May 1914 | Swanson |
| 1892605 | December 1932 | Betzler |
| 2119921 | June 1938 | Levy |
| 3221614 | December 1965 | Pertien |
| 4794749 | January 3, 1989 | Marcel |
| 749926 | May 1944 | DE2 |
| 12236 | 1915 | GBX |
| 1431766 | April 1976 | GBX |
Type: Grant
Filed: Sep 21, 1989
Date of Patent: May 26, 1992
Inventor: John F. Lewis (Quebec J0P 1J0)
Primary Examiner: A. Hugo Word
Assistant Examiner: Doris Clark
Law Firm: Price, Heneveld, Cooper, DeWitt & Litton
Application Number: 7/410,536
