Serial link communications protocol
CA 1250918 A · Owner: Motorola, Inc. · Inventors: Comroe, Richard A.; Browand, Wayne H.; Mitchell, Timothy A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with the present invention there is, provided an optimized, transmission-economized serial bus protocol comprising at least one eight-bit word further comprising at least an operation code and a subargument Fig. 2). The operation code and subargument comprise respectively, either a star-of-message character or start-of-reply character and either a device destination address or the device's source address (Fig. 3). Further an error detection device is provided comprising an even parity bit. Moreover, there is provided and optimized method of bus contention comprising monitoring the bus for an idle or busy bus condition and either attempting an asynchronous bus access if the bus …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 7, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.