Inventor · disambiguated record
Michael John Ludgate
Also filed as: LUDGATE MICHAEL · LUDGATE MICHAEL J · LUDGATE MICHAEL JOHN
18 granted patents·478 citations·filing 1991–2018
95Inventor score
Top patents by PatentIndex Score
18 records- 0192US5384869AImage processing apparatusSONY UK LTD·Filed 1992·Granted Jan 24, 1995·143 cites·27 claims
- 0289US5757973ACompression of image data seperated into frequency component data in a two dimensional spatial frequency domainSONY CORP·Filed 1991·Granted May 26, 1998·97 cites·9 claims
- 0379US10645131B2Seamless switching between multicast video streamsSONY CORP·Filed 2018·Granted May 5, 2020·2 cites·16 claims
- 0477US9942291B2Seamless switching between multicast video streamsSONY CORP·Filed 2014·Granted Apr 10, 2018·2 cites·4 claims
- 0575US6373895B2Video data compression with trial encoderSONY CORP·Filed 1999·Granted Apr 16, 2002·43 cites·29 claims
- 0674US10135891B2Seamless switching between multicast video streamsSONY CORP·Filed 2018·Granted Nov 20, 2018·1 cites·16 claims
- 0772US5404166AVariable-length to fixed-length data word reformatting apparatusSONY UK LTD·Filed 1993·Granted Apr 4, 1995·32 cites·13 claims
- 0870US5543861AMultichannel video data storage including buffers for reading data at fast rates and supplying data at slower ratesSONY CORP·Filed 1995·Granted Aug 6, 1996·44 cites·15 claims
- 0969USD436959SStorage device enclosureIOMEGA CORP·Filed 1999·Granted Jan 30, 2001·16 cites·1 claims
- 1053US5926612AApparatus for recording data with a multi-level arrangement of error correction codingSONY CORP·Filed 1996·Granted Jul 20, 1999·10 cites·15 claims
- 1150US5506687ADigital signal recording and/or reproducing apparatus that evenly distributes field data across tracksSONY CORP·Filed 1994·Granted Apr 9, 1996·12 cites·26 claims
- 1249US5842171AAudio signal processorSONY CORP·Filed 1997·Granted Nov 24, 1998·14 cites·5 claims
- 1347US5684896AData compressionSONY CORP·Filed 1994·Granted Nov 4, 1997·10 cites·7 claims
- 1446US6044431AData buffer using dummy dataSONY CORP·Filed 1997·Granted Mar 28, 2000·19 cites·11 claims
- 1544US6028633AVideo data compression with trial encoderSONY CORP·Filed 1996·Granted Feb 22, 2000·8 cites·11 claims
- 1642US6124894AAudio signal processorSONY CORP·Filed 1997·Granted Sep 26, 2000·9 cites·12 claims
- 1741US5892545AVideo compression with code allocation based on image detailSONY CORP·Filed 1996·Granted Apr 6, 1999·8 cites·5 claims
- 1840US6133956ADual standard video signals processorSONY CORP·Filed 1997·Granted Oct 17, 2000·8 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →