Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Thomas Koenig Newsgroups: comp.arch Subject: Re: Architectural implications of locate mode I/O and channels Date: Thu, 4 Jul 2024 21:15:46 -0000 (UTC) Organization: A noiseless patient Spider Lines: 31 Message-ID: References: <3d7df1c5113800b31f72d79005ae5897@www.novabbs.org> Injection-Date: Thu, 04 Jul 2024 23:15:46 +0200 (CEST) Injection-Info: dont-email.me; posting-host="7e5ebf4b9f51d8bbb79aa1ba5214d714"; logging-data="3077075"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/V9ZLNS0ICLMpQgAUdaVmRAPGYT9Rd7b0=" User-Agent: slrn/1.0.3 (Linux) Cancel-Lock: sha1:mygDjDRri2gxGkutp77n97HzlWg= Bytes: 2155 MitchAlsup1 schrieb: > Thomas Koenig wrote: > >> John Levine schrieb: >> >>> IBM patented the 709's channel: US Patent 3,812,475 filed in 1957 but >>> not granted until 1974. The patent is 488 pages long including 409 >>> pages of figures, 130 columns of narrative text, and 91 claims. >>> >>> https://patents.google.com/patent/US3812475A/en >> >> What a monster. >> >> I've written long patents myself, but this one surely takes the >> biscuit. > > The amalgamation of the figures and the placement of the figures > via the figure placement "figure" enable one to directly implement > the device in logic. That is, of course, very nice. But the sheer number of claims, 91, with around than half of them indpendent (but quite a few formulated as "in combination", so there may have been some dependency to other claims hidden in there... must have taken the competition quite some time to figure out what was actually covered, and if their own designs fell under that patent or not. And then it was granted after ~ 20 years, and continued to be valid for another ~ 20 - US patent law used to be weird.