HD Electric Co. Trademarks
MAX-I-METER
Filed: September 12, 1940
Meters for Measuring Conductor Load of Electrical Circuits
Owned by: HD Electric Co.
Serial Number: 71435901
PRIMAX-I-METER
Filed: April 14, 1961
Current Measuring Instrument Comprising a Splitcore Transformer with Secondary Winding and an Ammeter
Owned by: HD Electric Co.
Serial Number: 72117861
MAX-I-TRAN
Filed: April 14, 1961
Split-Core Transformer with Secondary Winding
Owned by: HD Electric Co.
Serial Number: 72117863
