Database set condition test instruction
CA 1074452 A · Owner: Honeywell Information Systems Inc. · Inventors: Bachman, Charles W.; Franklin, Benjamin S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Two of a series of hardware/firmware primitives are disclosed for converting a general purpose digital computer into a database machine. The invention comprises two hardware/ firmware implemented machine instructions which both fetch a set descriptor, which along with a base register BR allow, access to a record. For the Test Set Empty operation the, record accessed is an owner record and a check is made to see whether the set has nay member records currently associated with it. For the Test Member Inserted operation the record accessed, is checked to see whether it is currently inserted as a member of a particular set (i.e. a part of that set). -1-
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 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 1997.
- 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.