About: http://webisa.webdatacommons.org/335494441

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	said output means including means for holding said signal of the presence and absence of the person as in the preceding state thereof when said absolute value of difference exeeds said third reference value.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com