Patent ID: 8155449

Claim:
A method for comparing a first drawing and a second drawing; said first and second drawings being generated by a shape-based computer system; the method comprising: (a) in no particular order: (1) employing an automated drawing comparison tool in said shape-based computer system to automatically identify shapes stored in said shape-based computer system present in said first drawing; and (2) employing said automated drawing comparison tool to automatically identify shapes stored in said shape-based computer system present in said second drawing; (b) employing said automated drawing comparison tool to automatically compare said first drawing and said second drawing in said shape-based computer system; (c) in no particular order: (1) employing said automated drawing comparison tool to automatically identify deleted shapes; said deleted shapes being present in said first drawing and not present in said second drawing; and (2) employing said automated drawing comparison tool to automatically identify new shapes; said new shapes being present in said second drawing and not present in said first drawing; and (d) in no particular order: (1) employing said automated drawing comparison tool to automatically indicate said deleted shapes in said first drawing; and (2) employing said automated drawing comparison tool to automatically indicate said new shapes in said second drawing.