H. Erwin Grellmann has been granted 11 US patents while listed as an inventor at Tektronix . The first was granted in 1986 and the most recent in November 1999. H. Erwin Grellmann ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list H. Erwin Grellmann in Beaverton, OR, US.
Patents per Year Patents granted per year, 1986 to 1999 Bar chart with a peak of 3 patents in 1987. peak 3 1986: 1 patents 1986 1987: 3 patents 1987 1988: 2 patents 1988 1992: 1 patents 1992 1998: 2 patents 1998 1999: 2 patents 1999
Issued Patents All Time
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Showing 1–11 of 11 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
5975690 Solid ink stick supply system John B. Gilbert , Robert C. Tidrick , Perry E. Wingfield 1999-11-02
$7,368,000
5917528 Solid ink stick supply apparatus and method John B. Gilbert , Robert C. Tidrick , Randy C. Karambelas , William Bruce Weaver , James B. Jensen +1 more 1999-06-29
$3,027,000
5821952 Method for automatic print head spacing in an ink jet printer David D. Martenson , Robert C. Tidrick 1998-10-13
$1,419,000
5761597 Fusing apparatus for a printer Craig W. Smith , Leonard Guan , David D. Martenson 1998-06-02
$10,688,000
5109177 Damped cradle for saw device Emmanuel Sang 1992-04-28
$2,891,000
4789791 Rotary drive mechanism — 1988-12-06
$587,000
4721481 Replaceable RF connector Gerald K. Hein , Brian A. Ohlemeier , Randy C. Karambelas 1988-01-26
$3,004,000
4686492 Impedance match connection using multiple layers of bond wires Leonard A. Roland 1987-08-11
$1,874,000
4670723 Broad band, thin film attenuator and method for construction thereof Leonard A. Roland , Larry R. Lockwood 1987-06-02
$1,516,000
4657322 Microwave interconnect Keith E. Jones , Carl W. Laakso , John A. Wright 1987-04-14
$2,737,000
4598334 Capacitive tuning screw Keith E. Jones , John A. Wright 1986-07-01
$1,039,000
