792dc699__of_Land_Management_California__DEFINITION
[FEATURE] SINGLE WEIGHT PATENT LINE [DEFINITION] 
Line is heavy on the side of the property line that is patented. This same line type is used to depict Public Sales, State Grants, Warranty Deeds, Railroad Grants, and Allotments. (See Notations on the plats for specific use.)
Master Title Plat Abbreviations - Bureau of Land Management California
DEFINITION