Laser level (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Laser level" in English language version.

refsWebsite

Global rank English rank

800^th place

676^th place

2books.google.com

3^rd place

3^rd place

books.google.com

Blake, L. S. (22 October 2013). Civil Engineer's Reference Book. Elsevier. p. 6. ISBN 978-1-4831-0233-7.
J. Uren; W.F. Price (17 March 2010). Surveying for Engineers. Palgrave Macmillan. pp. 543–. ISBN 978-1-137-05279-7.

espacenet.com

worldwide.espacenet.com

US patent 3897637
US patent 4973158
US patent 5836081, Steven J. Orosz Jr., "Light beam leveling means and method", issued 1998-11-17, assigned to Schroeder, Charles F.