This is the earliest-dated surviving WLC documentation that shows the results of our early R&D activity to develop a new approach to the sensing of OMR data-marks on a student answer sheet, as opposed to individual discrete-photocells to sense the marks in each column. This notarized sketch and an accompanying JVM Technical Disclosure was the basis for filing a U. S. Patent Application on January 2, 1979, and granted on November 10, 1981, No. 4,300, 123, inventors McMillin, et al. The archival DVD Folder 1977_02_11_Notarized Copy_JVM Patent Sketch contains a JPEG-image file of the original sketch, and an MS Word file 1977_02_11_Notarized Copy of JVM,Schroeder Pat. Appl.Sketch_ORG.doc with JVM commentary. Hard-copy printout included