Key Figures · Companies · Maker

Jet Dynamics

An Idaho partnership whose register record names intake grates and ride plates, and whose founders' patent filings of 1991 to 1994 cover a shaft-shielding toploader and grate designs.

The BaddJet shop sells Jet Dynamics parts. This page is the archive's record of what the documents say, it links to no product and prints no price, and it follows the same rules as every other company here.

• a year printed above a fact on this page
• a year printed above no fact

Printed above the facts, 1992, 1996 and 1997. Printed above none, 1993 to 1995. 3 facts have no year printed above them and mark no box.

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What it made and sold

1992 · Confirmed

Two grating patents granted in 1993 and 1994 list among their references an advertisement by Jet Dynamics in Jet Sports, volume 11, number 3, of 1992, page 66.

Sources: US patent 5234361; US patent 5281177

1997 · Likely

Group K, commenting on the July 1997 issue of Watercraft Power, wrote that it had cured the high-speed instability of its 1130 Ventures with sponsons and a Jet Dynamics ride plate, and that Jet Dynamics did not yet make a plate for the Venture, so it modified one made for another model.

Sources: Group K Between the Lines 1997

Patents and trademarks

1996 and 1997 · Confirmed

The JET DYNAMICS mark, for personal watercraft equipment, namely intake grates and ride plates, was filed on 1 October 1996 and registered on 2 September 1997; the registrant claims first use on 30 April 1989. The registration was cancelled on 5 June 2004 because no acceptable Section 8 declaration was filed.

Sources: USPTO record serial 75174803; USPTO name searches Oct 2026

Likely

US patent 5,114,368, Shaft shielding top loader, filed on 1 April 1991, with a related application of 12 December 1989, and granted on 19 May 1992, names Don R. Moyle and Glendon L. Dilworth as inventors and prints no assignee. It claims a plate in the pump's water inlet that divides the incoming water into upper and lower parts, with a partition that shields the impeller drive shaft. Later patents cite it, among them a grating patent filed in 1994 and a BRP patent filed in 2013. Reading it as Jet Dynamics' work rests on the partnership's two names and on the company's name for its toploader, an inference.

Sources: US patent 5114368; USPTO record serial 75174803; US patent 5540605; US patent 8905800

Likely

Three US design patents name the same two inventors and no assignee: a fluid flow directing element for watercraft, filed in March 1991 and granted in May 1992; a watercraft skid plate, filed in October 1991 and granted in May 1993; and a jet-pump watercraft intake grate, filed in October 1994 and granted in January 1996. Their drawings were not read, and reading them as Jet Dynamics' work is the same inference.

Sources: US design patent D325917; US design patent D335484; US design patent D366444

The business on record

1992 · Confirmed

The Times-News of Twin Falls, Idaho, reported on 8 March 1992 that two veteran jet boat racers, Glen Dilworth and Don Moyle, had formed Jet Dynamics to manufacture and market their inventions. The US trademark register names the owner of the JET DYNAMICS mark as Jet Dynamics, an Idaho partnership composed of Glen L. Dilworth and Don R. Moyle.

Sources: Times-News 8 March 1992; USPTO record serial 75174803

Likely

The company's own page, read on 5 October 2026, calls Jet Dynamics the home of the Shaft Shielding Toploader and Concave Rideplate and offers toploader grates, ride plates and nozzles. It says the company was founded in 1990 by Glen Dilworth and Don Moyle and that Glen Dilworth acquired all rights to it in 1998. These are the company's own words; the register's first-use claim is 1989, and the newspaper of 1992 reports the two as having formed the company without a date.

Sources: Jet Dynamics home page; USPTO record serial 75174803

Names as printed

JET DYNAMICS (USPTO record serial 75174803)

Elsewhere in the archive

• History chapter: The aftermarket: pumps, plates, mats, registers
• Era: The early years, in print
• Era: The makers and their machines

What the archive has not read (2)

• No registry record of the partnership's formation or of the 1998 change of ownership is held; Idaho's business registry was not searched, and the 1998 change rests on the company's own page (searched the archive's mirror and research cache, 2026-10-16).
• The patent records name no assignee, and no assignee search for Jet Dynamics was run, because Google Patents could not be read on 6 October 2026.

Documents cited on this page

• USPTO record serial 75174803 (tsdr.uspto.gov): Trademark Status and Document Retrieval record, serial 75174803, registration 2093209 (JET DYNAMICS), United States Patent and Trademark Office, 1997-09-02; government, high. JET DYNAMICS, filed 1 October 1996, registered 2 September 1997, cancelled 5 June 2004 under Section 8, for personal watercraft intake grates and ride plates. Owner Jet Dynamics, an Idaho partnership composed of Glen L. Dilworth and Don R. Moyle. The published date is the registration date.
• US patent 5234361 (patents.google.com): US patent 5,234,361, Foiled grating for jet watercraft (USPTO record), United States Patent and Trademark Office, 1993-08-10; government, high. Filed 10 November 1992, granted 10 August 1993, inventors printed as Dickinson; Glenn and Chapin; William D., no assignee. Seven claims for an intake grating whose foil, carried on two lengthwise bars, divides the intake channel. The held text is the USPTO Patent Public Search record read on the accessed date (street addresses removed from the held copy); the link is the public Google Patents page for the same patent. It names no company, so tying it to R&D is an inference.
• US patent 5281177 (patents.google.com): US patent 5,281,177, Foiled grating for jet watercraft (USPTO record), United States Patent and Trademark Office, 1994-01-25; government, high. Filed 5 August 1993 with a related application of 10 November 1992 (the filing date of 5,234,361), granted 25 January 1994, inventors printed as Dickinson; Glenn and Chapin; William, no assignee, five claims. Held as the USPTO Patent Public Search record; the link is the Google Patents page.
• Group K Between the Lines 1997 (groupk.com): Between The Lines - January 97 to December 97 (Group K, groupk.com), Group K, 1997; enthusiast media, medium. The same shop's comments on the technical items in the PWC magazines of 1997, issue by issue, kept on its site under the heading January 97 to December 97. Read on 2026-10-05 and held as text; the page is current and no earlier capture is held, so the dating rests on the heading and the issue-by-issue layout. Medium as a trade participant's period commentary, cited only for which products it names as existing.
• USPTO name searches Oct 2026 (tmsearch.uspto.gov): USPTO tmsearch records, name searches for the parts makers (read 2026-10-06), United States Patent and Trademark Office, 2026-10-06; government, high. Our extract of USPTO's trademark search records for name searches run on 2026-10-06: Skat-Trak spellings, WORX, R&D and AQUAVEIN, Jet Dynamics, Ocean Pro, Hydro-Turf and Pacific Creations, JET STRIP, Solas and others, each with the total the search reported, and the records for the marks that exist. High for what the register records; a query with no hits is recorded as no records, which is an absence in this register and no other.
• US patent 5114368 (patents.google.com): US patent 5,114,368, Shaft shielding top loader (USPTO record), United States Patent and Trademark Office, 1992-05-19; government, high. Filed 1 April 1991 with a related application of 12 December 1989, granted 19 May 1992, inventors printed as Moyle; Don R. and Dilworth; Glendon L., no assignee. Two claims for a top loading plate in a jet pump's water inlet with a partition that shields the impeller drive shaft. (as US patent 5281177 above)
• US patent 5540605 (patents.google.com): US patent 5,540,605, Water inlet foil grating of motorboat (USPTO record), United States Patent and Trademark Office, read in Patent Public Search, 1996-07-30; government, high. Filed 15 July 1994, granted 30 July 1996, inventor printed Solas Y. J. Lin, no assignee. Its references include US 5,114,368 and US 5,234,361, and its description sets it against the grating of the latter. The held text is USPTO's Patent Public Search record; the link goes to Google Patents. The printed patent was not read.
• US patent 8905800 (patents.google.com): US patent 8,905,800, Inlet grate for a water jet propulsion system (USPTO record), United States Patent and Trademark Office, read in Patent Public Search, 2014-12-09; government, high. Assigned to BRP US Inc., filed 18 July 2013 with a related application of 31 August 2009, granted 9 December 2014. Cited here for what its applicant listed as references: US 5,114,368 and US 5,540,605, and web pages the applicant dates, among them an Aquavien Pro shoe and grate of 2002, an R&D grate of 2004 and a Riva Yamaha GPR race grate and pump shoe of 11 May 2001. The record does not hold the pages.
• US design patent D325917 (patents.google.com): US design patent D325,917, Fluid flow directing element for watercraft (USPTO record), United States Patent and Trademark Office, 1992-05-05; government, high. Filed 29 March 1991 with a related application of 12 December 1989, granted 5 May 1992, inventors printed as Moyle; Don R. One claim, the ornamental design as shown and described; the drawings were not read. (as US patent 5281177 above)
• US design patent D335484 (patents.google.com): US design patent D335,484, Watercraft skid plate (USPTO record), United States Patent and Trademark Office, 1993-05-11; government, high. Filed 7 October 1991, granted 11 May 1993, inventors printed as Moyle; Don R. Its one US reference is Klus's D317,431. (as US patent 5281177 above)
• US design patent D366444 (patents.google.com): US design patent D366,444, Jet-pump watercraft intake grate (USPTO record), United States Patent and Trademark Office, 1996-01-23; government, high. Filed 13 October 1994, granted 23 January 1996, inventors printed as Dilworth; Glendon L. and Moyle; Don R., no assignee. (as US patent 5281177 above)
• Times-News 8 March 1992 (archive.org): The Times-News (Twin Falls, Idaho), 8 March 1992, article on Jet Dynamics (archive.org OCR excerpt), The Times-News, issue held by the Internet Archive, 1992-03-08; editorial, medium. A local newspaper's report, in raw column-interleaved OCR, that Glen Dilworth and Don Moyle, veteran jet boat racers, formed Jet Dynamics to make and market their inventions. Only phrases the OCR prints whole are used. Passages not used are removed from the held copy.
• Jet Dynamics home page (jet-dynamics.com): Jet Dynamics home page (jet-dynamics.com, read 2026), Jet Dynamics; manufacturer primary, low. The company's own page, copyright 2023, giving its founding in 1990 by Glen Dilworth and Don Moyle and naming its products as patented. Low, as a company's account of its own history; used only beside an independent source. Contact details are removed from the held copy.

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“Jet Dynamics”, BaddJet archive, https://baddjetarchive.com/key-figures/companies/jet-dynamics/

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