div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=inventions-esearch-reas-heliographhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: INVENTIONS ESEARCH REAS - Heliograph loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentsfrreader031viewer202202070161f7eee19436ad1ee2199d84html5thumbnails1jpg width=140 height=200 divpINVENTIONS RESEARCH AREASpdiv
