(12) United States Patent (16) Patent N6.= US 6,230,416 B1 Trigilio (45) Date of Patent: May 15, 2001
US006230416B1 (12) United States Patent (16) Patent N6.= US 6,230,416 B1 Trigilio (45) Date of Patent: May 15, 2001 (54) LASER SQUARE (56) References Cited (76) Inventor: Anthony J. Trigilio, 5033 Joseph St., U'S' PATENT DOCUMENTS Maple Heights, OH (US) 44137 5,531,031 * 7/1996 Green ................................... .. 33/365 5,568,265 * 10/1996 Matthews. .. ( * ) Notice: Subject to any disclaimer, the term of this 5,713,135 * 2/1998 Acopulos . patentU_S_C_ is154(k)) extended by() ordays adjusted under 35 5,727,3255,894,6755,966,8266,041,510 * 10/19993/19984/19993/2000 M11556“CericolaH0Huff ...... ..................................... .. .. 33/374 (21) Appl. No.1 09/216,411 * cited by examiner (22) Filed: Dec. 18, 1998 Primary Examiner—AndreW H. Hirshfeld RltdU.S.A l' t' Dt Assistant Examiner—R. Alexander Smith ea e pp lea Ion a a (74) Attorney, Agent, or Firm—D. Peter Hochberg; (60) Provisional application No. 60/069,412, ?led on Dec. 18, 1997_ Katherine R. Vieyra; William H. Holt (51) Int. c1.7 ........................... .. B43L 7/027; G01B 7/305 (57) ABSTRACT (52) US. Cl. ............................... .. 33/474; 33/451; 33/475; Asquare holding a laser device for transmitting a laser beam _ 33/DIG' 21 to generate straight lines from the square to the surface upon (58) Field of Search ................................ .. 33/424, 275 R, Which the laser beam impihges_ 33/286, 404, 405, 416, 418, 420, 423, 427, 429, 451, 474, 480, DIG. 21, 475, 476 6 Claims, 1 Drawing Sheet 2 _ _ I, 539 Illv| nlllllill 1% ; 5 U.S. Patent May 15,2001 US 6,230,416 B1 mm) I US 6,230,416 B1 1 2 LASER SQUARE dimensions, the hypotenuse of a triangle.
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