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USPTO Patent Rankings Data through Dec 31, 2025
Home › Drexelbrook Controls › L. Jonathan Kramer
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L. Jonathan Kramer — 16 Patents

DCDrexelbrook Controls: 9 patents #2 of 21Top 10%
DEDrexelbrook Engineering: 4 patents #1 of 5Top 20%
AMAmetek: 2 patents #36 of 215Top 20%
Warminster, PA: #3 of 248 inventorsTop 2%
Pennsylvania: #4,567 of 74,527 inventorsTop 7%
Overall (All Time): #284,196 of 4,157,543Top 7%
16 Patents All Time
L. Jonathan Kramer has been granted 16 US patents while listed as an inventor at Drexelbrook Controls. The first was granted in 1980 and the most recent in May 2002. L. Jonathan Kramer ranks #284,196 of 4,157,543 US inventors in our database (top 6.8%). Patent records list L. Jonathan Kramer in Warminster, PA, US.

Patents per Year

Patents granted per year, 1980 to 2002Bar chart with a peak of 2 patents in 1986.peak 21980: 1 patents19801982: 1 patents1986: 2 patents19861988: 1 patents1989: 1 patents19891991: 1 patents1994: 1 patents19941996: 2 patents1998: 1 patents19981999: 1 patents2000: 1 patents20002001: 2 patents2002: 1 patents2002

Issued Patents All Time

Showing 1–16 of 16 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6388431 High efficiency power supply for a two-wire loop powered device Kevin G. Hafer 2002-05-14 $8,737,000
6212943 Method and apparatus for the sonic measurement of sludge and clarity conditions during the treatment on waste water Frederick L. Maltby, Yang Wang, Norman Nardelli 2001-04-10 $7,794,000
6215319 High accuracy measuring system Kevin G. Hafer 2001-04-10
6062070 Method and apparatus for the sonic measurement of sludge and clarity conditions during the treatment of waste water Frederick L. Maltby, Yang Wang, Norman Nardelli 2000-05-16
5987994 Ultrasonic method for material monitoring Frederick L. Maltby, Glen Mitchell 1999-11-23
5760309 Ultrasonic method for material monitoring Frederick L. Maltby, Glen Mitchell 1998-06-02
5539670 Coating responsive material condition monitoring system Frederick L. Maltby, Steven Petersen 1996-07-23
5510779 Error compensating instrument system with digital communications Frederick L. Maltby, Leslie D. Horrocks, deceased, by Maureen Horrocks, executrix, David M. Stern 1996-04-23
5278513 Continuous condition sensing system Steven Petersen, Herbert A. Shauger, Jr. 1994-01-11
5045797 Continuous condition sensing system determining liquid level by admittance measurement Steven Petersen, Herbert A. Shauger, Jr. 1991-09-03
4799174 Multiple set point condition monitoring systems Steven Petersen 1989-01-17
4788488 Continuous condition sensing system Steven R. Peterson, Herbert A. Shauger, Jr. 1988-11-29
4573040 Fail-safe instrument system Frederick L. Maltby 1986-02-25
4568874 RF Admittance apparatus and method for monitoring the contents of a pipe Frederick L. Maltby 1986-02-04
4363030 Fail-safe instrument system Frederick L. Maltby 1982-12-07
4208909 Admittance sensing probe having multiple sensing elements Frederick L. Maltby 1980-06-24

Frequent Collaborators

Frederick L. Maltby10 shared
Steven Petersen4 shared
Herbert A. Shauger, Jr.3 shared
Glen Mitchell2 shared
Kevin G. Hafer2 shared
Norman Nardelli2 shared

Nearby-Ranked Inventors

Chung-Lin Fu16
Tyrone T. Chen16
Shivendra Katiyar16
Kevin E. Kalajan16
Henry Y. Mark16
Marco Becker16
Nak Gi Sung16
Kenta Iwai16
Brock Mammoser16