238000009792 diffusion process Methods 0.000 description 2.238000009435 building construction Methods 0.000 abstract description 4.230000001427 coherent Effects 0.000 abstract description 8. 230000000875 corresponding Effects 0.000 claims description 10.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Rooney Michael filed Critical Rooney Michael Priority to US08/348,256 priority Critical patent/US5481809A/en Priority to PCT/US1996/000484 priority patent/WO1997025591A1/en Application granted granted Critical Publication of US5481809A publication Critical patent/US5481809A/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US08/348,256 Inventor Michael Rooney Original Assignee Rooney Michael Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Laser plumb bob and apparatusÄownload PDF Info Publication number US5481809A US5481809A US08/348,256 US34825694A US5481809A US 5481809 A US5481809 A US 5481809A US 34825694 A US34825694 A US 34825694A US 5481809 A US5481809 A US 5481809A Authority US United States Prior art keywords plumb bob plumb laser line target Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5481809A - Laser plumb bob and apparatus US5481809A - Laser plumb bob and apparatus
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