pcolleary Posted May 5, 2018 Share Posted May 5, 2018 Hi , I can't find anything about this. It's a pretty neat gauge. Thanks in advance. Pat Link to comment Share on other sites More sharing options...
Grandpa Posted May 5, 2018 Share Posted May 5, 2018 Per Patent Office, volume 284 - "Batteries, Indicators for showing state of charge of storage. Cellokay Manufacturing Company. No. 140,585; Mar. 29: v. 284: p. 935." Link to comment Share on other sites More sharing options...
pcolleary Posted May 5, 2018 Author Share Posted May 5, 2018 Thank you. Link to comment Share on other sites More sharing options...
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