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Human energy harvesting and storage system - Google Patents
Patents Granted on 1897-??-?? - datamp.org
CALIFORNIA LEVEL PATENTS - pasttools.org
Patent #588,916, United States Patent Office, Aug. 24, 1897
Patent Issue Date Details For 1897 - DATAMP
'Los Padres National Forest Homestead Patent' | 1897 | 160 acres …
Index of patents relating to electricity : embracing patents issued …
1897 Patented California Land Patent Updates