Michael E. Bitzel has been granted 9 US patents while listed as an inventor at Black & Decker . The first was granted in 1983 and the most recent in November 2003. Michael E. Bitzel ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Michael E. Bitzel in Stevensville, MD, US.
Patents per Year Patents granted per year, 1983 to 2003 Bar chart with a peak of 4 patents in 1990. peak 4 1983: 1 patents 1983 1989: 1 patents 1989 1990: 4 patents 1990 1996: 1 patents 1996 2002: 1 patents 2002 2003: 1 patents 2003
Issued Patents All Time
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Showing 1–9 of 9 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
6648567 Tool-free collet tightener Robert A. Berry , Allen Brelsford , John Louis McKibben 2003-11-18
$9,930,000
6350087 Tool-free collet tightener Robert A. Berry , Allen Brelsford , John Louis McKibben 2002-02-26
$27,240,000
5526596 Electric iron with storage base and method of storing the iron Edward M. Kubicz , David Jalbert , Kenneth H. Patrick , Michael D. Morrissey , Arthur H. Freeman 1996-06-18
$10,713,000
4947514 Internal contact for a charging circuit Burton E. Gerke, Jr. , Robert Kubicko , Charles Z. Krasznai 1990-08-14
$3,324,000
4928346 Hand-held vacuum cleaner with power brush Donald E. Elson , Burton E. Gerke, Jr. , Bruce A. Wilder , Stanley J. Rodowsky, Jr. , William R. Lessig, III +2 more 1990-05-29
$3,569,000
4920606 Electrical power circuit for a vacuum cleaner Burton E. Gerke, Jr. , Robert Kubicko , Charles Z. Krasznai 1990-05-01
$5,125,000
4912805 Dual-purpose rotating brush for vacuum cleaner Charles Z. Krasznai , William D. Ryckman, Jr. 1990-04-03
$2,767,000
4841594 Cordless vacuum cleaner with power brush Donald E. Elson , Burton E. Gerke, Jr. , Bruce A. Wilder , Stanley J. Rodowsky, Jr. , William R. Lessig, III +2 more 1989-06-27
$3,540,000
4385276 Mounting of semiconductor sensing means for an electromagnetic tachometer in a portable electric tool — 1983-05-24
$7,095,000