Frederick L. Maltby — 20 Patents at Drexelbrook Controls

Frederick L. Maltby has been granted 20 US patents while listed as an inventor at Drexelbrook Controls. The first was granted in 1980 and the most recent in April 2001. Frederick L. Maltby ranks #214,803 of 4,157,543 US inventors in our database (top 5.2%). Patent records list Frederick L. Maltby in Abington, PA, US.

Issued Patents All Time

Showing 1–20 of 20 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6212943	Method and apparatus for the sonic measurement of sludge and clarity conditions during the treatment on waste water	Yang Wang, Norman Nardelli, L. Jonathan Kramer	2001-04-10	$7,794,000
6062070	Method and apparatus for the sonic measurement of sludge and clarity conditions during the treatment of waste water	Yang Wang, Norman Nardelli, L. Jonathan Kramer	2000-05-16
5987994	Ultrasonic method for material monitoring	L. Jonathan Kramer, Glen Mitchell	1999-11-23
5835454	Transducer shroud for improved transducer operation in the treatment of waste water	—	1998-11-10
5777550	High reliability instrument system	Glen Mitchell, Mort Gorowitz	1998-07-07
5760309	Ultrasonic method for material monitoring	L. Jonathan Kramer, Glen Mitchell	1998-06-02
5539670	Coating responsive material condition monitoring system	L. Jonathan Kramer, Steven Petersen	1996-07-23
5510779	Error compensating instrument system with digital communications	L. Jonathan Kramer, Leslie D. Horrocks, deceased, by Maureen Horrocks, executrix, David M. Stern	1996-04-23
4849754	Remotely calibratable instrument system	Richard Hall, Jonathan L. Kramer, Howard S. Hoopes, Steven Petersen	1989-07-18
4757252	Probe system for measuring the condition of materials	Edward R. Woerner, Thomas E. Meacham, Jr., Steven Petersen	1988-07-12
4723122	Remotely calibratable instrument system	Richard Hall, Jonathan L. Kramer, Howard S. Hoopes, Steven Petersen	1988-02-02
4573040	Fail-safe instrument system	L. Jonathan Kramer	1986-02-25
4568874	RF Admittance apparatus and method for monitoring the contents of a pipe	L. Jonathan Kramer	1986-02-04
4511948	Two layer probe	Kenneth M. Loewenstern, Jack G. Benning, Jr.	1985-04-16
4428026	Two layer probe	Kenneth M. Loewenstern, Jack G. Benning, Jr.	1984-01-24
4363030	Fail-safe instrument system	L. Jonathan Kramer	1982-12-07
4332167	Method of making an RF admittance measuring probe and product thereof	Robert J. Sun	1982-06-01
4301681	Method of using capacitor probe with a semiconductive electrode	Kenneth M. Loewenstern, Jack G. Benning, Jr.	1981-11-24
4235106	System and method for obtaining compensated level measurements	David M. Stern	1980-11-25
4208909	Admittance sensing probe having multiple sensing elements	L. Jonathan Kramer	1980-06-24

Frederick L. Maltby — 20 Patents

Issued Patents All Time

Patent Widget