RZ

Richard J. Zelm

📍 Lac du Flambeau, WI: #2 of 4 inventorsTop 50%
🗺 Wisconsin: #6,850 of 40,088 inventorsTop 20%
Overall (All Time): #722,338 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
10782357 Automatic insulation resistance testers with heater 2020-09-22
9977067 Automatic insulation resistance testers 2018-05-22
9664716 Automatic insulation resistance testers 2017-05-30
5524448 Minimum off-time device for protecting refrigeration compressors after a power interruption James W. Schwanebeck 1996-06-11
5514967 Automatic insulation test equipment for testing high voltage electrical equipment at the rated voltage level 1996-05-07
5172289 Automatic insulation tester for grounded and ungrounded electrical equipment 1992-12-15
5155441 Automatic insulation tester for grounded and ungrounded electrical equipment 1992-10-13