Harmen Van As has been granted 10 US patents while listed as an inventor at IBM . The first was granted in 1989 and the most recent in April 2003. Harmen Van As ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Harmen Van As in Thalwil, CH.
Patents per Year Patents granted per year, 1989 to 2003 Bar chart with a peak of 2 patents in 1994. peak 2 1989: 1 patents 1989 1993: 1 patents 1993 1994: 2 patents 1994 1996: 1 patents 1996 1997: 1 patents 1997 1998: 2 patents 1998 1999: 1 patents 1999 2003: 1 patents 2003
Issued Patents All Time
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Showing 1–10 of 10 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
6556593 Digital cross connect and add/drop multiplexing device for SDH or SONET signals Andreas Herkersdorf , Wolfram Lemppenau 2003-04-29
$13,645,000
5901140 Selective congestion control mechanism for information networks Hans Rudolf Schindler 1999-05-04
$26,914,000
5768258 Selective congestion control mechanism for information networks Hans Rudolf Schindler 1998-06-16
$7,430,000
5764392 Access control system for a multi-channel transmission ring Hans Rudolf Schindler 1998-06-09
$6,285,000
5636164 Gate array for accelerating access to a random access memory Hans Rudolf Schindler , Wolfram Lemppenau 1997-06-03
$12,468,000
5515265 Apparatus for determining the optimal value of a control parameter Hans Rudolf Schindler , Wolfram Lemppenau 1996-05-07
$18,293,000
5327428 Collision-free insertion and removal of circuit-switched channels in a packet-switched transmission structure Wolfram Lemppenau , Erwin A. Zurfluh 1994-07-05
$10,877,000
5276682 Medium access technique for LAN systems Wolfram Lemppenau 1994-01-04
$5,325,000
5214649 Insert/remove signalling in LAN systems Wolfram Lemppenau , Erwin A. Zurfluh 1993-05-25
$9,080,000
4843606 Local area communication system for integrated services based on a token-ring transmission medium Werner Bux , Felix H. Closs , Johann Mueller , Pitro A. Zafiropulo 1989-06-27
$15,584,000
