(
13902
of
13902
)
Full text is not available for this patent. Click on "Images" button above to view full patent.
United States Patent
1,799,398
Issue Date:
April 7, 1931
Current U.S. Class:
367/56
; 367/63
Current International Class:
G01V 1/00 (20060101)
* * * * *
![[US Patent & Trademark Office, Patent Full Text and Image Database]](/netaicon/PTO/patfthdr.gif)
![[Home]](/netaicon/PTO/home.gif)
![[Boolean Search]](/netaicon/PTO/boolean.gif)
![[Manual Search]](/netaicon/PTO/manual.gif)
![[Number Search]](/netaicon/PTO/number.gif)
![[Help]](/netaicon/PTO/help.gif)
![[PREV_LIST]](/netaicon/PTO/prevlist.gif)
![[HIT_LIST]](/netaicon/PTO/hitlist.gif)
![[PREV_DOC]](/netaicon/PTO/prevdoc.gif)
![[Bottom]](/netaicon/PTO/bottom.gif)
![[View Shopping Cart]](/netaicon/PTO/cart.gif)
![[Add to Shopping Cart]](/netaicon/PTO/order.gif)
![[Image]](/netaicon/PTO/image.gif)
![[Top]](/netaicon/PTO/top.gif)