Matthew P Wojciechowski
Engineers at Raleigh St, Westminster, CO

5816519, Oct 6, 1998

Aug 1, 1997

8/904512

Lynn C. Jacobs - Berthoud CO
Donovan M. Janssen - Boulder CO
Joe K. Jurneke - Brighton CO
Matthew P. Wojciechowski - Louisville CO

Storage Technology Coproration - Louisville CO

G03B 102

2423324

A tape threading apparatus (20) includes a tape guide arm (22) having a spring-biased elbow (32). The arm (22) is coupled for rotation with a rotatable shaft (24). The shaft is provided with a barrel cam (76, 92) for a third dimension of movement. A drive mechanism includes two gears (88, 90) that overlap to permit vertical slippage in the third dimension of movement. An arm guide cam slot (102) provides a directional orientation for movement of the arm (22) along a tape travel pathway (100).

6687070, Feb 3, 2004

Jul 11, 2000

09/614192

David L. Peterson - Boulder CO
Matthew P. Wojciechowski - Westminster CO

Storage Technology Corporation - Louisville CO

G11B 509

360 53, 360 31

A tape reader is designed to read down-level linear track tapes having a multiple number of new tacks in the positions of each older wider track and having tape subject to pack level tape distortions which may result from environmental stresses and inter-use delay time. If tracks are displaced with respect to ideal servo reference positions, then optimal down-level reading may require selecting segments from different new track choices along the length of the tape. Decision choices of tracks and longitudinal break points are based on a; combination of gathered metrics per tape and engineering knowledge of each product. These data are stored first in internal memory. Longer-term memory storage particular to each tape may include cartridge memory either in the form of possible cartridge chip memory or writing to a section of tape in each cartridge. Decisions may be optimized with increasing number of read cycles and supplemented by knowledge in longer-term cartridge memory. For strong tape distortion, an intermediate step requirement may be the separate reading of whole tracks into buffer memory per channel and then reading the alternate track choice separately while selecting the proper segment of each track on a per channel basis.

6101060, Aug 8, 2000

May 28, 1999

9/322782

Matthew Peter Wojciechowski - Louisville CO
Joe Kent Jurneke - Brighton CO

Storage Technology Corporation - Louisville CO

G11B 2104

360 70

A method and associated apparatus for reduction of data loss errors in computer data tape transport applications. In tape transport devices with moveable read heads (i. e. auto-tracking read/playback heads), by sensing telemetry information regarding tape movement and alignment of a position on the tape medium before the position on the tape encounters the moveable head. Prior systems provided for such sensing only as the tape was read by the moveable head such that compensation could be made only for subsequent read operation. By sensing the telemetry data in advance of the tape encountering the moveable head, the head may be adjusted in time to encounter the misaligned tape medium compensating for the misalignment. Similarly, telemetry data relating to the speed of the tape motion as sensed by a channel reading a predetermined recorded sequence of bits permits compensation for both erroneous tape speed and tape medium stretch or contraction.

6038092, Mar 14, 2000

Apr 27, 1998

9/067597

Matthew Peter Wojciechowski - Broomfield CO
Kurt William Pyatt - Longmont CO

Storage Technology Corporation - Louisville CO

G11B 509, G11B 2736, G11B 1548

360 53

A characteristic of helical scan tracks is that a distortion that occurs in the written data tracks is not uniform over the entire length of the track. Therefore, segments of the helical scan track can be read even though the entirety of the helical scan track cannot be read in a single pass. Therefore, laterally moving the read heads a predetermined distance in a selected direction to access a section of the helical track can produce full amplitude read signals and thereby that section of helical scan track can be read. Once a section of the helical scan track is read, the read heads are moved another incremental distance to access a next section of the distorted helical scan track. Each section of the track is thereby read on a different helical scan as the read heads are incrementally repositioned on each scan. The read sections of the helical scan track are stored in the memory of the tape drive control unit and then used to reconstruct the entirety of the track.

5519554, May 21, 1996

Nov 17, 1994

8/343960

Christian A. Todd - Thornton CO
Donovan M. Janssen - Boulder CO
Lynn C. Jacobs - Berthoud CO
Matthew P. Wojciechowski - Louisville CO

Storage Technology Corporation - Louisville CO

G11B 555, G11B 2108

360106

A read/write head positioning device for vertically displacing a magnetic head relative to a tape transport path of a high-performance tape path system, enabling the magnetic head to read and write magnetic data on a plurality of parallel data tracks of a passing magnetic medium which is moving longitudinally on the tape transport path. The device includes a support base assembly fixedly secured in a position proximate to the tape transport path, a carriage assembly adapted to securely receive a magnetic head, and a rack and pinion linear slide bearing unit interposed between the carriage and base to enable the carriage to smoothly and controllably move in the vertical axis relative to the base under the control of an electromagnetic device. The linear slide mechanism includes a rectangular carriage and a base of substantially U-shaped cross-section disposed so as to straddle the carriage. The carriage has longitudinal recesses of rectangular cross-section symmetrically formed on parallel side surfaces.

5963389, Oct 5, 1999

Aug 8, 1997

8/907181

Matthew Peter Wojciechowski - Louisville CO
Joe Kent Jurneke - Brighton CO

Storage Technology Corporation - Louisville CO

G11B 2104

360 70

The tape transport system acquires telemetry information pertaining to the tape medium at a position in advance of the associated tape segment passing over the movable read head. The advance telemetry information includes tape motion and position information which is used to identify both physical defects in the tape medium and misalignment of the tape medium with respect to the movable read head. The advance telemetry information are used to adjust the tape speed and the position of the movable read head with respect to the tape medium as the tape moves ahead to encounter the read head. This compensation can significantly reduce the data loss errors induced by tape speed and tape tracking errors.

5692623, Dec 2, 1997

Dec 20, 1995

8/575628

John S. Todor - Arvada CO
Matthew P. Wojciechowski - Louisville CO
David Trachy - Niwot CO

Storage Technology Corporation - Louisville CO

G11B 23023

211 41

A multimedia array (100) is formed from a plurality of compartments (102, 104) that are capable of receiving differently sized cartridges (30, 50, 70) for presentment to a robotic arm (166). The compartments each include a sidewall ramp (150) for use in centering the cartridges in the compartments, and a rearward boss (134) for positioning forward surfaces (32, 52, 72) of the respective cartridges equidistantly (at distance D) from the forwardmost surface (114) of the compartments.

6912104, Jun 28, 2005

Apr 30, 2002

10/136981

Steven G. Trabert - Boulder CO, US
Matthew P. Wojciechowski - Westminster CO, US

Storage Technology Corporation - Louisville CO

G11B005/584

360 7712, 360 722

Identification of servo tracks is provided by adding one or more additional symbols to the write elements of at least some tracks on a servo recording head. The additional symbols are ignored for timing purposes, as they are not necessarily symmetrical, but the added symbols provide identification by their alterations on the otherwise identical patterns.

7145460, Dec 5, 2006

Jun 28, 2004

10/878890

Matthew P. Wojciechowski - Westminster CO, US
William T. Veno - Thornton CO, US

Storage Technology Corporation - Louisville CO

G08B 13/14

3405728, 3405721, 360134

A data tape storage cartridge for a data storage system that has a transponder for reading and writing data. The data storage tape cartridge includes a housing having a window and at least one wall. A panel is retained on the housing and configured to cover the window. A retainer is provided on the panel for the transponder. The transponder functions as an identification tag to which data is written and from which data is read to identify the data storage tape cartridge. The removable panel may also include a write protect switch that may be actuated to prevent a tape from being overwritten.

7212118, May 1, 2007

Dec 26, 2003

10/746064

Matthew P. Wojciechowski - Westminster CO, US
Howard Hayakawa - Lafayette CO, US
James C. Cates - Superior CO, US
Gary Francis - Westminster CO, US
William T. Veno - Thornton CO, US

Storage Technology Corporation - Louisville CO

G08B 13/14

3405721, 3405728, 360134

A cartridge system uses a pluggable remotely accessible tag to store information related to the cartridge. These tags may be accessed by tape drives having pluggable remotely accessing receivers.