Chadwick-Helmuth Company, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
H05B ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR 1110

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE31486 Rapid starting of gas discharge lampsMay 20, 82Jan 03, 84[H05B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6139271 Helicopter rotor blade weightingExpiredMar 16, 99Oct 31, 00[B64C]
4531408 Control of rotor blade stroboscopic displayExpiredDec 06, 82Jul 30, 85[G01M, G01B]

Top Inventors for This Owner

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