Rolm Corporation
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Dec 03, 1991 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 140 Total Citation Count
- Jun 27, 1980 Earliest Filing
- 6 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
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Recent Publications
- No Recent Publications to Display
Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5070439 DC to DC converter apparatus employing push-pull oscillatorsExpiredMar 12, 91Dec 03, 91[H02M]
4805209 Coordinated transfer of voice and information through a digital switchExpiredDec 09, 87Feb 14, 89[H04M]
4494229 Interconnecting apparatus for a distributed switching telephone systemExpiredDec 16, 81Jan 15, 85[H04Q]
4320520 Transmitter/receiver for use on common cable communications system such as ethernetExpiredJun 27, 80Mar 16, 82[H04B]
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