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USPTO Patent Rankings Data through Dec 31, 2025
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Gerd Marhofer — 9 Patents

UNUnknown: 2 patents #12,644 of 83,584Top 20%
IGIfm Electronic Gmbh: 1 patents #52 of 145Top 40%
Werden, DE: #3 of 19 inventorsTop 20%
Overall (All Time): #535,341 of 4,157,543Top 15%
9 Patents All Time
Gerd Marhofer has been granted 9 US patents while listed as an inventor at Unknown. The first was granted in 1980 and the most recent in June 1990. Gerd Marhofer ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Gerd Marhofer in Werden, DE.

Patents per Year

Patents granted per year, 1980 to 1990Bar chart with a peak of 2 patents in 1980.peak 21980: 2 patents19801984: 1 patents19841985: 2 patents19851987: 1 patents19871988: 1 patents19881989: 1 patents19891990: 1 patents1990

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
4932256 Heat transmission measuring instrument, in particular flow monitor Robert Buck 1990-06-12
4856329 Heat transfer measurement device, in particular flow monitor Robert Buck 1989-08-15
4748740 Automatic component mounting machine Robert Buck 1988-06-07
4663542 Electronic proximity sensor Robert Buck 1987-05-05
4543566 Electronic monitoring system with malfunction indicator Robert Buck, Hans-Dieter Gesthuysen 1985-09-24
4525699 Electronic monitoring system with malfunction indicator Robert Buck, Michael Friedrich, Hans-Dieter Gesthuysen 1985-06-25
4424458 Contactless proximity sensor with multilevel response Robert Buck 1984-01-03
4225748 Switching device, especially for electronic contactless switches, e.g. proximity switches Robert Buck 1980-09-30
4193023 Electronic monitoring system with low energy consumption in quiescent state Robert Buck 1980-03-11