David L. Braun — 22 Patents at 3M

David L. Braun has been granted 22 US patents while listed as an inventor at 3M. The first was granted in 1981 and the most recent in July 2000. David L. Braun ranks #189,202 of 4,157,543 US inventors in our database (top 4.6%). Patent records list David L. Braun in North Canton, OH, US.

Issued Patents All Time

Showing 1–22 of 22 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6089252	Manifold for auxiliary fuel tank	—	2000-07-18
5961778	Corrugating apparatus	James E. Steffen, Raju Venkatapathy	1999-10-05	$16,797,000
5955193	Apparel containing corrugated microfiber-containing thermal insulation	James E. Steffen, Raju Venkatapathy	1999-09-21	$45,206,000
5830311	Corrugating apparatus	James E. Steffen	1998-11-03	$14,210,000
5804295	Fibrous filtration face mask having corrugated polymeric microfiber filter layer	James E. Steffen	1998-09-08	$16,300,000
5763078	Filter having corrugated nonwoven webs of polymeric microfiber	James E. Steffen	1998-06-09	$12,619,000
5753343	Corrugated nonwoven webs of polymeric microfiber	James E. Steffen, Raju Venkatapathy	1998-05-19	$9,915,000
5656368	Fibrous filtration face mask having corrugated polymeric microfiber filter layer	James E. Steffen	1997-08-12	$18,597,000
5639700	Thermal insulation containing corrugated nonwoven web of polymeric microfiber	James E. Steffen, Raju Venkatapathy	1997-06-17	$20,272,000
5620545	Method of making a corrugated nonwoven web of polymeric microfiber	James E. Steffen, Raju Venkatapathy	1997-04-15	$7,449,000
D371587	Goal for football practice	—	1996-07-09
5078132	Bonded adsorbent structures and respirators incorporating same	Peter O. Rekow	1992-01-07	$5,737,000
5052084	Elastic strap fastener assembly	—	1991-10-01	$6,948,000
5035240	Elastomeric filtration materials	Peter O. Rekow, Daniel E. Meyer	1991-07-30	$16,160,000
5033465	Bonded adsorbent structures and respirators incorporating same	Peter O. Rekow	1991-07-23	$6,858,000
4934362	Unidirectional fluid valve	—	1990-06-19	$5,354,000
4790306	Respiratory mask having a rigid or semi-rigid, insert-molded filtration element and method of making	Donald L. Melvin	1988-12-13	$15,585,000
4668535	Process for preparing a fuel tank of polyurethane laminate having contiguous contrasting layers	Paul E. Liggett	1987-05-26	$3,605,000
4583911	Multiple fluid pathway energy converter	—	1986-04-22	$11,563,000
4565729	Polyurethane laminate of contrasting layers and process therefor	Paul E. Liggett	1986-01-21	$15,534,000
4462399	Powered air respirator and cartridge	—	1984-07-31	$6,511,000
4262408	Assembling hose units for appliances	Ernest D. Johnson	1981-04-21	$1,647,000

David L. Braun — 22 Patents

Issued Patents All Time

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