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For the Inventor, By the Inventor

Grand Rapids, MI, United States of America

Rapistan Corporation

Calculating rank
USPTO Granted Patents = 23

Forward Citations = 754

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30 inventors (with patents filed for the assignee):

goldMedal David H Cotter (3 out of 26 patents)

silverMedal Bernard H Woltjer (3 out of 11 patents)

bronzeMedal Wesley R Maxted (3 out of 3 patents)

4.  Gerald A Brouwer (2 out of 20 patents)

5.  Curtis E LeMay (2 out of 15 patents)

6.  Martin R Doane (2 out of 4 patents)

7.  Howard A Zollinger (2 out of 2 patents)

8.  LeRoy Lubbers (2 out of 2 patents)

9.  Charles W Saur (2 out of 7 patents)

10.  Arthur J Terpstra, Jr (1 out of 3 patents)

11.  Ahmad Khodor (1 out of 1 patent)

12.  James P Kohls (1 out of 1 patent)

13.  James P Kohls (1 out of 1 patent)

14.  Ahmad Khodor (1 out of 1 patent)

15.  Martin R Doane (1 out of 1 patent)


23 patents:

1. 5341916 - Controlled spacing induction (1994-08-30),
2. 5191967 - Conveyor system having non-singulating accumulation conveyor (1993-03-09),
3. 5135100 - Track intersection pin guide (1992-08-04),
4. 5101958 - Flowspitting conveyor (1992-04-07),
5. 5038912 - Vertically actuated transfer switch (1991-08-13),
6. 5038911 - Controlled spacing induction from plural lines (1991-08-13),
7. 4878578 - Split-cam conveyor rollers (1989-11-07),
8. 4738347 - Diverter shoe and diverting rail (1988-04-19),
9. 4329576 - Data storage means and reading system therefor (1982-05-11),
10. 4223780 - Accumulation conveyors (1980-09-23),
11. 4203370 - In-floor towline automatic re-entry spur (1980-05-20),
12. 4189273 - Modular warehouse conveyor system (1980-02-19),
13. 4181947 - Conveyor sorting system (1980-01-01),
14. 4074805 - Installation equipment with a driving mechanism (1978-02-21),
15. 4044897 - Conveyor sorting and orienting system (1977-08-30),
Company Overview
Rapistan Corporation, based in Grand Rapids, MI, specializes in the design and manufacturing of material handling systems. The company focuses on providing innovative solutions for the logistics and distribution sectors, enhancing efficiency in the movement of goods. With a strong emphasis on automation and engineering, Rapistan develops advanced conveyor systems and related technologies, catering to a diverse range of industries. Their expertise supports businesses in optimizing operations and improving supply chain management.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 10 2026

23 Patents

#32 in Grand Rapids, MI

#524 in Michigan

#14,466 in US

#27,777 in the World

Grand Rapids, MI (US)
Grand Rapids, MI, United States of America

Rapistan Corporation

Forward Citations = 754

30 inventors:

goldMedal David H Cotter (3 out of 26 patents)

silverMedal Bernard H Woltjer (3 out of 11 patents)

bronzeMedal Wesley R Maxted (3 out of 3 patents)

4.  Gerald A Brouwer (2 out of 20 patents)

5.  Curtis E LeMay (2 out of 15 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Rapistan Corporation. Retrieved from https://idiyas.com/company/rapistan

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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